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>

include/dm/platform_data/lpc32xx_hsuart.h

@@ -1,6 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2015 Vladimir Zapolskiy <vz@mleia.com>
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _LPC32XX_HSUART_PLAT_H

include/dm/platform_data/net_ethoc.h

@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2016 Cadence Design Systems Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0
  */
 
 #ifndef _ETHOC_H

include/dm/platform_data/pfe_dm_eth.h

@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2015-2016 Freescale Semiconductor, Inc.
  * Copyright 2017 NXP
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __PFE_DM_ETH_H__

include/dm/platform_data/serial_bcm283x_mu.h

@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * (C) Copyright 2016 Stephen Warren <swarren@wwwdotorg.org>
  *
  * Derived from pl01x code:
  * Copyright (c) 2014 Google, Inc
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __serial_bcm283x_mu_h

include/dm/platform_data/serial_coldfire.h

@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2015  Angelo Dureghello <angelo@sysam.it>
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #ifndef __serial_coldfire_h

include/dm/platform_data/serial_mxc.h

@@ -1,6 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2014 Google, Inc
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __serial_mxc_h

include/dm/platform_data/serial_pl01x.h

@@ -1,6 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2014 Google, Inc
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __serial_pl01x_h

include/dm/platform_data/serial_pxa.h

@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2016 Marcel Ziswiler <marcel.ziswiler@toradex.com>
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #ifndef __SERIAL_PXA_H

include/dm/platform_data/serial_sh.h

@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2014  Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
  * Copyright (c) 2014  Renesas Electronics Corporation
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __serial_sh_h

include/dm/platform_data/serial_stm32.h

@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * (C) Copyright 2015
  * Kamil Lulko, <kamil.lulko@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __SERIAL_STM32_H