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/freescale/ls1021aqds/dcu.c b/board/freescale/ls1021aqds/dcu.c
index 90f5bc0..14855ea 100644
--- a/board/freescale/ls1021aqds/dcu.c
+++ b/board/freescale/ls1021aqds/dcu.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
  *
  * FSL DCU Framebuffer driver
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <asm/io.h>
diff --git a/board/freescale/ls1021aqds/ddr.c b/board/freescale/ls1021aqds/ddr.c
index 2ee8749..98faf93 100644
--- a/board/freescale/ls1021aqds/ddr.c
+++ b/board/freescale/ls1021aqds/ddr.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/freescale/ls1021aqds/ddr.h b/board/freescale/ls1021aqds/ddr.h
index b39b561..ff1fe8e 100644
--- a/board/freescale/ls1021aqds/ddr.h
+++ b/board/freescale/ls1021aqds/ddr.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __DDR_H__
diff --git a/board/freescale/ls1021aqds/eth.c b/board/freescale/ls1021aqds/eth.c
index bf3e08a..d0a9883 100644
--- a/board/freescale/ls1021aqds/eth.c
+++ b/board/freescale/ls1021aqds/eth.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * This file handles the board muxing between the RGMII/SGMII PHYs on
  * Freescale LS1021AQDS board. The RGMII PHYs are the three on-board 1Gb
  * ports. The SGMII PHYs are provided by the standard Freescale four-port
diff --git a/board/freescale/ls1021aqds/ls1021aqds.c b/board/freescale/ls1021aqds/ls1021aqds.c
index 99c1032..6722cad 100644
--- a/board/freescale/ls1021aqds/ls1021aqds.c
+++ b/board/freescale/ls1021aqds/ls1021aqds.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/freescale/ls1021aqds/ls1021aqds_qixis.h b/board/freescale/ls1021aqds/ls1021aqds_qixis.h
index 8e482eb..7ad08a5 100644
--- a/board/freescale/ls1021aqds/ls1021aqds_qixis.h
+++ b/board/freescale/ls1021aqds/ls1021aqds_qixis.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __LS1021AQDS_QIXIS_H__
diff --git a/board/freescale/ls1021aqds/psci.S b/board/freescale/ls1021aqds/psci.S
index 598168c..0f38c93 100644
--- a/board/freescale/ls1021aqds/psci.S
+++ b/board/freescale/ls1021aqds/psci.S
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2016 NXP Semiconductor.
  * Author: Wang Dongsheng <dongsheng.wang@freescale.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>