usb: dwc3: Modify the file headers to u-boot format

Modified the file header to the format that is used in u-boot. Also
included in the header, the commit in linux kernel from which each of
these files are added.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 1bc77a3..c9fcb77 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -1,19 +1,17 @@
 /**
  * ep0.c - DesignWare USB3 DRD Controller Endpoint 0 Handling
  *
- * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
  *
  * Authors: Felipe Balbi <balbi@ti.com>,
  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2  of
- * the License as published by the Free Software Foundation.
+ * Taken from Linux Kernel v3.19-rc1 (drivers/usb/dwc3/ep0.c) and ported
+ * to uboot.
  *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * commit c00552ebaf : Merge 3.18-rc7 into usb-next
+ *
+ * SPDX-License-Identifier:     GPL-2.0
  */
 
 #include <linux/kernel.h>