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/congatec/Kconfig b/board/congatec/Kconfig
index fb341bf..e9fa153 100644
--- a/board/congatec/Kconfig
+++ b/board/congatec/Kconfig
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 if VENDOR_CONGATEC
 
diff --git a/board/congatec/cgtqmx6eval/Makefile b/board/congatec/cgtqmx6eval/Makefile
index 1bce473..2c45ca0 100644
--- a/board/congatec/cgtqmx6eval/Makefile
+++ b/board/congatec/cgtqmx6eval/Makefile
@@ -1,10 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
 #
 # (C) Copyright 2011 Freescale Semiconductor, Inc.
 # (C) Copyright 2013 Adeneo Embedded <www.adeneo-embedded.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y  := cgtqmx6eval.o
diff --git a/board/congatec/cgtqmx6eval/cgtqmx6eval.c b/board/congatec/cgtqmx6eval/cgtqmx6eval.c
index 1647b61..50124f8 100644
--- a/board/congatec/cgtqmx6eval/cgtqmx6eval.c
+++ b/board/congatec/cgtqmx6eval/cgtqmx6eval.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
  * Based on mx6qsabrelite.c file
  * Copyright (C) 2013, Adeneo Embedded <www.adeneo-embedded.com>
  * Leo Sartre, <lsartre@adeneo-embedded.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/congatec/conga-qeval20-qa3-e3845/Makefile b/board/congatec/conga-qeval20-qa3-e3845/Makefile
index b784510..2f04828 100644
--- a/board/congatec/conga-qeval20-qa3-e3845/Makefile
+++ b/board/congatec/conga-qeval20-qa3-e3845/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2015, Google, Inc
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	+= conga-qeval20-qa3.o start.o
 obj-$(CONFIG_GENERATE_ACPI_TABLE) += dsdt.o
diff --git a/board/congatec/conga-qeval20-qa3-e3845/acpi/mainboard.asl b/board/congatec/conga-qeval20-qa3-e3845/acpi/mainboard.asl
index eace459..856960d 100644
--- a/board/congatec/conga-qeval20-qa3-e3845/acpi/mainboard.asl
+++ b/board/congatec/conga-qeval20-qa3-e3845/acpi/mainboard.asl
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* Power Button */
diff --git a/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c b/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
index 1283eeb..9751337 100644
--- a/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
+++ b/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016 Stefan Roese <sr@denx.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/congatec/conga-qeval20-qa3-e3845/dsdt.asl b/board/congatec/conga-qeval20-qa3-e3845/dsdt.asl
index 6042011..d2297ef 100644
--- a/board/congatec/conga-qeval20-qa3-e3845/dsdt.asl
+++ b/board/congatec/conga-qeval20-qa3-e3845/dsdt.asl
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 DefinitionBlock("dsdt.aml", "DSDT", 2, "U-BOOT", "U-BOOTBL", 0x00010000)
diff --git a/board/congatec/conga-qeval20-qa3-e3845/start.S b/board/congatec/conga-qeval20-qa3-e3845/start.S
index 2c941a4..65d1f7e 100644
--- a/board/congatec/conga-qeval20-qa3-e3845/start.S
+++ b/board/congatec/conga-qeval20-qa3-e3845/start.S
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015, Google, Inc
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 .globl early_board_init