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>
diff --git a/board/samsung/common/Makefile b/board/samsung/common/Makefile
index fa85f7d..3593c77 100644
--- a/board/samsung/common/Makefile
+++ b/board/samsung/common/Makefile
@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2012 Samsung Electronics
 # Lukasz Majewski <l.majewski@samsung.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-$(CONFIG_USB_GADGET_DOWNLOAD) += gadget.o
 obj-$(CONFIG_MISC_COMMON) += misc.o
diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c
index 88299f1..c4b6bae 100644
--- a/board/samsung/common/board.c
+++ b/board/samsung/common/board.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2013 SAMSUNG Electronics
  * Rajeshwari Shinde <rajeshwari.s@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/samsung/common/exynos-uboot-spl.lds b/board/samsung/common/exynos-uboot-spl.lds
index 8c49779..0d4be42 100644
--- a/board/samsung/common/exynos-uboot-spl.lds
+++ b/board/samsung/common/exynos-uboot-spl.lds
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * (C) Copyright 2002
  * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
@@ -5,8 +6,6 @@
  * Copyright (C) 2012 Samsung Electronics
  *
  * Based on arch/arm/cpu/armv7/omap-common/u-boot-spl.lds
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE, \
diff --git a/board/samsung/common/exynos5-dt-types.c b/board/samsung/common/exynos5-dt-types.c
index 03d3a31..4473968 100644
--- a/board/samsung/common/exynos5-dt-types.c
+++ b/board/samsung/common/exynos5-dt-types.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2015 Samsung Electronics
  * Przemyslaw Marczak <p.marczak@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/samsung/common/exynos5-dt.c b/board/samsung/common/exynos5-dt.c
index 862644b..9f6f654 100644
--- a/board/samsung/common/exynos5-dt.c
+++ b/board/samsung/common/exynos5-dt.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2012 Samsung Electronics
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/samsung/common/gadget.c b/board/samsung/common/gadget.c
index ef732be..6d783e6 100644
--- a/board/samsung/common/gadget.c
+++ b/board/samsung/common/gadget.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Copyright (C) 2013 Samsung Electronics
  *  Lukasz Majewski <l.majewski@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/samsung/common/misc.c b/board/samsung/common/misc.c
index eba25b7..c9df7e6 100644
--- a/board/samsung/common/misc.c
+++ b/board/samsung/common/misc.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2013 Samsung Electronics
  * Przemyslaw Marczak <p.marczak@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>