boards/arm/at32: 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.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>

boards/arm/at32/at32f437-mini/include/board.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/include/board.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

boards/arm/at32/at32f437-mini/kernel/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm/at32/at32f437-mini/kernel/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

boards/arm/at32/at32f437-mini/kernel/at32_userspace.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/kernel/at32_userspace.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

boards/arm/at32/at32f437-mini/scripts/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm/at32/at32f437-mini/scripts/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

boards/arm/at32/at32f437-mini/scripts/kernel-space.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/scripts/kernel-space.ld
  *
+ * 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

boards/arm/at32/at32f437-mini/scripts/ld.script

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/scripts/ld.script
  *
+ * 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

boards/arm/at32/at32f437-mini/scripts/memory.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/scripts/memory.ld
  *
+ * 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

boards/arm/at32/at32f437-mini/scripts/user-space.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/scripts/user-space.ld
  *
+ * 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

boards/arm/at32/at32f437-mini/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/arm/at32/at32f437-mini/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

boards/arm/at32/at32f437-mini/src/at32_adc.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_adc.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

boards/arm/at32/at32f437-mini/src/at32_appinit.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_appinit.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

boards/arm/at32/at32f437-mini/src/at32_at24.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_at24.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

boards/arm/at32/at32f437-mini/src/at32_autoleds.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_autoleds.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

boards/arm/at32/at32f437-mini/src/at32_boot.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_boot.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

boards/arm/at32/at32f437-mini/src/at32_bringup.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_bringup.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

boards/arm/at32/at32f437-mini/src/at32_can.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_can.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

boards/arm/at32/at32f437-mini/src/at32_cansock.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_cansock.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

boards/arm/at32/at32f437-mini/src/at32_ethernet.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_ethernet.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

boards/arm/at32/at32f437-mini/src/at32_gpio.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_gpio.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

boards/arm/at32/at32f437-mini/src/at32_mmcsd.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_mmcsd.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

boards/arm/at32/at32f437-mini/src/at32_pwm.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_pwm.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

boards/arm/at32/at32f437-mini/src/at32_spi.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_spi.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

boards/arm/at32/at32f437-mini/src/at32_timer.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_timer.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

boards/arm/at32/at32f437-mini/src/at32_usb.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_usb.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

boards/arm/at32/at32f437-mini/src/at32_userleds.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_userleds.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

boards/arm/at32/at32f437-mini/src/at32_w25.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32_w25.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

boards/arm/at32/at32f437-mini/src/at32f437-mini.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/at32f437-mini.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

boards/arm/at32/at32f437-mini/src/etc_romfs.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/arm/at32/at32f437-mini/src/etc_romfs.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