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/linux/usb/at91_udc.h

@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Platform data definitions for Atmel USBA gadget driver
  * pieces copied from linux:include/linux/platform_data/atmel.h
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 #ifndef __LINUX_USB_AT91_UDC_H__
 #define __LINUX_USB_AT91_UDC_H__

include/linux/usb/atmel_usba_udc.h

@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Platform data definitions for Atmel USBA gadget driver
  * [Original from Linux kernel: include/linux/usb/atmel_usba_udc.h]
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 #ifndef __LINUX_USB_USBA_H__
 #define __LINUX_USB_USBA_H__

include/linux/usb/composite.h

@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * composite.h -- framework for usb gadgets which are composite devices
  *
  * Copyright (C) 2006-2008 David Brownell
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef	__LINUX_USB_COMPOSITE_H

include/linux/usb/dwc3-omap.h

@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /* include/linux/usb/dwc3-omap.h
  *
  * Copyright (c) 2014 Texas Instruments Incorporated - http://www.ti.com
  *
  * Designware SuperSpeed Glue
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __DWC3_OMAP_H_

include/linux/usb/dwc3.h

@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /* include/linux/usb/dwc3.h
  *
  * Copyright (c) 2012 Samsung Electronics Co. Ltd
  *
  * Designware SuperSpeed USB 3.0 DRD Controller global and OTG registers
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __DWC3_H_

include/linux/usb/otg.h

@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /* include/linux/usb/otg.h
  *
  * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
  *
  * USB OTG (On The Go) defines
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #ifndef __LINUX_USB_OTG_H

include/linux/usb/xhci-fsl.h

@@ -1,11 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2015 Freescale Semiconductor, Inc.
  *
  * FSL USB HOST xHCI Controller
  *
  * Author: Ramneek Mehresh<ramneek.mehresh@freescale.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _ASM_ARCH_XHCI_FSL_H_

include/linux/usb/xhci-omap.h

@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * (C) Copyright 2013
  * Texas Instruments Inc, <www.ti.com>
  *
  * Author: Dan Murphy <dmurphy@ti.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _ASM_ARCH_XHCI_OMAP_H_