boards/: Move more drivers directories at were placed too high in the hieararchy.

boards/xtensa/esp32/drivers/Kconfig

@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#

boards/z16/z16f2811/drivers/Kconfig

@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#

boards/z80/ez80/drivers/Kconfig

@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#

boards/z80/z180/drivers/Kconfig

@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#

boards/z80/z8/drivers/Kconfig

@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#

boards/z80/z80/drivers/Kconfig

@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#

sched/wqueue/kwork_process.c

@@ -128,7 +128,7 @@ void work_process(FAR struct kwork_wqueue_s *wqueue, int wndx)
    */
 
   work = (FAR struct work_s *)wqueue->q.head;
-  while (work)
+  while (work != NULL)
     {
       /* Is this work ready?  It is ready if there is no delay or if
        * the delay has elapsed. qtime is the time that the work was added