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/toradex/colibri_imx6/800mhz_2x64mx16.cfg b/board/toradex/colibri_imx6/800mhz_2x64mx16.cfg
index 660f9d3..c940714 100644
--- a/board/toradex/colibri_imx6/800mhz_2x64mx16.cfg
+++ b/board/toradex/colibri_imx6/800mhz_2x64mx16.cfg
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013 Boundary Devices
  * Copyright (C) 2014-2016, Toradex AG
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 DATA 4, MX6_MMDC_P0_MDPDC, 0x0002002D
diff --git a/board/toradex/colibri_imx6/800mhz_4x64mx16.cfg b/board/toradex/colibri_imx6/800mhz_4x64mx16.cfg
index 3bd8576..c319d2a 100644
--- a/board/toradex/colibri_imx6/800mhz_4x64mx16.cfg
+++ b/board/toradex/colibri_imx6/800mhz_4x64mx16.cfg
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013 Boundary Devices
  * Copyright (C) 2014-2016, Toradex AG
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 DATA 4, MX6_MMDC_P0_MDPDC, 0x0002002D
diff --git a/board/toradex/colibri_imx6/clocks.cfg b/board/toradex/colibri_imx6/clocks.cfg
index be96094..1bcbc4f 100644
--- a/board/toradex/colibri_imx6/clocks.cfg
+++ b/board/toradex/colibri_imx6/clocks.cfg
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013 Boundary Devices
  * Copyright (C) 2014-2016, Toradex AG
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * Device Configuration Data (DCD)
  *
  * Each entry must have the format:
diff --git a/board/toradex/colibri_imx6/colibri_imx6.c b/board/toradex/colibri_imx6/colibri_imx6.c
index 7c50bbb..68c0c02a 100644
--- a/board/toradex/colibri_imx6/colibri_imx6.c
+++ b/board/toradex/colibri_imx6/colibri_imx6.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2010-2013 Freescale Semiconductor, Inc.
  * Copyright (C) 2013, Boundary Devices <info@boundarydevices.com>
  * Copyright (C) 2014-2016, Toradex AG
  * copied from nitrogen6x
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/toradex/colibri_imx6/colibri_imx6.cfg b/board/toradex/colibri_imx6/colibri_imx6.cfg
index e7886de..517c5eb 100644
--- a/board/toradex/colibri_imx6/colibri_imx6.cfg
+++ b/board/toradex/colibri_imx6/colibri_imx6.cfg
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013 Boundary Devices
  * Copyright (C) 2014 Toradex AG
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * Refer doc/README.imximage for more details about how-to configure
  * and create imximage boot image
  *
diff --git a/board/toradex/colibri_imx6/ddr-setup.cfg b/board/toradex/colibri_imx6/ddr-setup.cfg
index f46ae55..a943fd2 100644
--- a/board/toradex/colibri_imx6/ddr-setup.cfg
+++ b/board/toradex/colibri_imx6/ddr-setup.cfg
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013 Boundary Devices
  * Copyright (C) 2014-2016, Toradex AG
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * Device Configuration Data (DCD)
  *
  * Each entry must have the format:
diff --git a/board/toradex/colibri_imx6/do_fuse.c b/board/toradex/colibri_imx6/do_fuse.c
index cff07e9..e6793e3 100644
--- a/board/toradex/colibri_imx6/do_fuse.c
+++ b/board/toradex/colibri_imx6/do_fuse.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2014-2016, Toradex AG
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /*
diff --git a/board/toradex/colibri_imx6/pf0100.c b/board/toradex/colibri_imx6/pf0100.c
index 62e64ab..fa63865 100644
--- a/board/toradex/colibri_imx6/pf0100.c
+++ b/board/toradex/colibri_imx6/pf0100.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2014-2016, Toradex AG
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /*
diff --git a/board/toradex/colibri_imx6/pf0100.h b/board/toradex/colibri_imx6/pf0100.h
index af1e88f..c0efb79 100644
--- a/board/toradex/colibri_imx6/pf0100.h
+++ b/board/toradex/colibri_imx6/pf0100.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014-2016, Toradex AG
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /*
diff --git a/board/toradex/colibri_imx6/pf0100_otp.inc b/board/toradex/colibri_imx6/pf0100_otp.inc
index 255392b..ce29b95 100644
--- a/board/toradex/colibri_imx6/pf0100_otp.inc
+++ b/board/toradex/colibri_imx6/pf0100_otp.inc
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2014-2016, Toradex AG
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 // Register Output for PF0100 programmer