media: usb: add SPDX identifiers to some code I wrote

As we're now using SPDX identifiers, on several
media drivers I wrote, add the proper SPDX, identifying
the license I meant.

As we're now using the short license, it doesn't make sense to
keep the original license text.

Also, fix MODULE_LICENSE to properly identify GPL v2.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/usb/tm6000/tm6000-i2c.c

@@ -1,20 +1,10 @@
-/*
- *  tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
- *
- *  Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
- *
- *  Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
- *	- Fix SMBus Read Byte command
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation version 2
- *
- *  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.
- */
+// SPDX-License-Identifier: GPL-2.0
+// tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
+//
+// Copyright (c) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
+//
+// Copyright (c) 2007 Michel Ludwig <michel.ludwig@gmail.com>
+//	- Fix SMBus Read Byte command
 
 #include <linux/module.h>
 #include <linux/kernel.h>