arch/z16: migrate to SPDX identifier

Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.

arch/z16/include/arch.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/arch.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/inttypes.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/inttypes.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/irq.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/irq.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/limits.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/limits.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/syscall.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/syscall.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/types.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/types.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/z16f/arch.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/z16f/arch.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/z16f/chip.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/z16f/chip.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/include/z16f/irq.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/include/z16f/irq.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # arch/z16/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_allocateheap.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_allocateheap.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_copystate.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_copystate.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_createstack.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_createstack.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_doirq.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_doirq.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_exit.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_exit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_idle.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_idle.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_initialize.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_initialize.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_initialstate.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_initialstate.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_internal.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_internal.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_mdelay.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_mdelay.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_nputs.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_nputs.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_registerdump.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_registerdump.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_releasestack.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_releasestack.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_schedulesigaction.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_schedulesigaction.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_sigdeliver.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_sigdeliver.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_stackframe.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_stackframe.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_switchcontext.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_switchcontext.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_udelay.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_udelay.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/common/z16_usestack.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/common/z16_usestack.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # arch/z16/src/z16f/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/Toolchain.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # arch/z16/src/z16f/Toolchain.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/chip.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/chip.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_clkinit.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/z16f_clkinit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_espi.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/z16f_espi.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_head.S

@@ -1,6 +1,7 @@
 /**************************************************************************
  * arch/z16/src/z16f/z16f_head.S
- * Z16F Reset Entry Point
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with

arch/z16/src/z16f/z16f_irq.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/z16f_irq.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_lowuart.S

@@ -1,6 +1,7 @@
 /*************************************************************************
  * arch/z16/src/z16f/z16f_lowuart.asm
- * Z16F UART management
+ *
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with

arch/z16/src/z16f/z16f_restoreusercontext.S

@@ -1,6 +1,8 @@
 /*************************************************************************
  * arch/z16/src/z16f/z16f_restoreusercontext.asm
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_saveusercontext.S

@@ -1,6 +1,8 @@
 /*************************************************************************
  * arch/z16/src/z16f/z16f_saveusercontext.asm
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_serial.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/z16f_serial.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_sysexec.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/z16f_sysexec.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

arch/z16/src/z16f/z16f_timerisr.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * arch/z16/src/z16f/z16f_timerisr.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The