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/rockchip/evb_px5/Makefile b/board/rockchip/evb_px5/Makefile
index f5aa5a9..40f6ff8 100644
--- a/board/rockchip/evb_px5/Makefile
+++ b/board/rockchip/evb_px5/Makefile
@@ -1,7 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2017 Rockchip Electronics Co., Ltd
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	+= evb-px5.o
diff --git a/board/rockchip/evb_px5/evb-px5.c b/board/rockchip/evb_px5/evb-px5.c
index 6a47642..53e753f 100644
--- a/board/rockchip/evb_px5/evb-px5.c
+++ b/board/rockchip/evb_px5/evb-px5.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2017 Andy Yan
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 #include <common.h>
 
diff --git a/board/rockchip/evb_rk3036/evb_rk3036.c b/board/rockchip/evb_rk3036/evb_rk3036.c
index 86187e3..d5acc4f 100644
--- a/board/rockchip/evb_rk3036/evb_rk3036.c
+++ b/board/rockchip/evb_rk3036/evb_rk3036.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/evb_rk3229/evb_rk3229.c b/board/rockchip/evb_rk3229/evb_rk3229.c
index 5fe1868..63c84fc 100644
--- a/board/rockchip/evb_rk3229/evb_rk3229.c
+++ b/board/rockchip/evb_rk3229/evb_rk3229.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/evb_rk3288/evb-rk3288.c b/board/rockchip/evb_rk3288/evb-rk3288.c
index a82f0ae..d6992a2 100644
--- a/board/rockchip/evb_rk3288/evb-rk3288.c
+++ b/board/rockchip/evb_rk3288/evb-rk3288.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/evb_rk3328/evb-rk3328.c b/board/rockchip/evb_rk3328/evb-rk3328.c
index 99a73da..bc9ef5e 100644
--- a/board/rockchip/evb_rk3328/evb-rk3328.c
+++ b/board/rockchip/evb_rk3328/evb-rk3328.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/evb_rk3399/evb-rk3399.c b/board/rockchip/evb_rk3399/evb-rk3399.c
index 0f9267b..3e9e83f 100644
--- a/board/rockchip/evb_rk3399/evb-rk3399.c
+++ b/board/rockchip/evb_rk3399/evb-rk3399.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/evb_rv1108/evb_rv1108.c b/board/rockchip/evb_rv1108/evb_rv1108.c
index 54bd08b..107929e 100644
--- a/board/rockchip/evb_rv1108/evb_rv1108.c
+++ b/board/rockchip/evb_rv1108/evb_rv1108.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C)Copyright 2016 Rockchip Electronics Co., Ltd
  * Authors: Andy Yan <andy.yan@rock-chips.com>
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/fennec_rk3288/fennec-rk3288.c b/board/rockchip/fennec_rk3288/fennec-rk3288.c
index aad74ef..ce45544 100644
--- a/board/rockchip/fennec_rk3288/fennec-rk3288.c
+++ b/board/rockchip/fennec_rk3288/fennec-rk3288.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/kylin_rk3036/kylin_rk3036.c b/board/rockchip/kylin_rk3036/kylin_rk3036.c
index e1af124..3a2f083 100644
--- a/board/rockchip/kylin_rk3036/kylin_rk3036.c
+++ b/board/rockchip/kylin_rk3036/kylin_rk3036.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2015 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/rockchip/sheep_rk3368/Makefile b/board/rockchip/sheep_rk3368/Makefile
index a38b9ce..9661528 100644
--- a/board/rockchip/sheep_rk3368/Makefile
+++ b/board/rockchip/sheep_rk3368/Makefile
@@ -1,7 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2017 Rockchip Electronics Co., Ltd
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	+= sheep_rk3368.o
diff --git a/board/rockchip/sheep_rk3368/sheep_rk3368.c b/board/rockchip/sheep_rk3368/sheep_rk3368.c
index 348818c..ea22cb9 100644
--- a/board/rockchip/sheep_rk3368/sheep_rk3368.c
+++ b/board/rockchip/sheep_rk3368/sheep_rk3368.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2017 Andy Yan
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 #include <common.h>
 #include <asm/io.h>
diff --git a/board/rockchip/tinker_rk3288/tinker-rk3288.c b/board/rockchip/tinker_rk3288/tinker-rk3288.c
index 0f2abe2..44f1318 100644
--- a/board/rockchip/tinker_rk3288/tinker-rk3288.c
+++ b/board/rockchip/tinker_rk3288/tinker-rk3288.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Rockchip Electronics Co., Ltd
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>