SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>

4 files changed, 4 insertions, 9 deletions

diff --git a/board/ti/am43xx/Makefile b/board/ti/am43xx/Makefile
index 36ecb302c1..60a11d8c04 100644
--- a/board/ti/am43xx/Makefile
+++ b/board/ti/am43xx/Makefile
@@ -1,10 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Makefile
 #
 # Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 ifeq ($(CONFIG_SKIP_LOWLEVEL_INIT),)
 obj-y	:= mux.o
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index 44f9774eb9..2a59b06035 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * board.c
  *
  * Board functions for TI AM43XX based boards
  *
  * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/ti/am43xx/board.h b/board/ti/am43xx/board.h
index 3f93d13727..06b737445d 100644
--- a/board/ti/am43xx/board.h
+++ b/board/ti/am43xx/board.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * board.h
  *
@@ -5,8 +6,6 @@
  * Derived from AM335x board.
  *
  * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _BOARD_H_
diff --git a/board/ti/am43xx/mux.c b/board/ti/am43xx/mux.c
index f26b21e869..a61987e4c6 100644
--- a/board/ti/am43xx/mux.c
+++ b/board/ti/am43xx/mux.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * mux.c
  *
  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>