watchdog: Convert GPL 2.0 notice to SPDX identifier

Convert the boilerplate to SPDX license identifier. While at it, also
move SPDX identifier for drivers/watchdog/rtd119x_wdt.c to the top of
file (as in other files).

Cc: Ray Lehtiniemi <[e-mail]>,
Cc: Alessandro Zummo <[e-mail]>
Cc: H Hartley Sweeten <[e-mail]>
Cc: Deepak Saxena <[e-mail]>
Cc: Marc Zyngier <[e-mail]>
Cc: Jonas Jensen <[e-mail]>
Cc: Sylver Bruneau <[e-mail]>
Cc: Denis Turischev <[e-mail]>
Cc: Mika Westerberg <[e-mail]>
Acked-by: Andreas Färber <[e-mail]>
Signed-off-by: Bagas Sanjaya <[e-mail]>
Acked-by: Mika Westerberg <[e-mail]>
Acked-by: Ray Lehtiniemi <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/ep93xx_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Watchdog driver for Cirrus Logic EP93xx family of devices.
  *
···
  *
  * Copyright (c) 2012 H Hartley Sweeten <[e-mail]>
  *	Convert to a platform device and use the watchdog framework API
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  *
  * This watchdog fires after 250msec, which is a too short interval
  * for us to rely on the user space daemon alone. So we ping the

drivers/watchdog/m54xx_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * drivers/watchdog/m54xx_wdt.c
  *
···
  *  Copyright 2004 (c) MontaVista, Software, Inc.
  *  Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <[e-mail]>
  *
- * This file is licensed under  the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

drivers/watchdog/max63xx_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * drivers/char/watchdog/max63xx_wdt.c
  *
  * Driver for max63{69,70,71,72,73,74} watchdog timers
  *
  * Copyright (C) 2009 Marc Zyngier <[e-mail]>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  *
  * This driver assumes the watchdog pins are memory mapped (as it is
  * the case for the Arcom Zeus). Should it be connected over GPIOs or

drivers/watchdog/moxart_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * MOXA ART SoCs watchdog driver.
  *
···
  *
  * Jonas Jensen <[e-mail]>
  *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #include <linux/clk.h>

drivers/watchdog/octeon-wdt-nmi.S

···
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
  * Copyright (C) 2007-2017 Cavium, Inc.
  */
 #include <asm/asm.h>

drivers/watchdog/orion_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * drivers/watchdog/orion_wdt.c
  *
···
  *
  * Author: Sylver Bruneau <[e-mail]>
  *
- * This file is licensed under  the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

drivers/watchdog/rtd119x_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Realtek RTD129x watchdog
  *
  * Copyright (c) 2017 Andreas Färber
  *
- * SPDX-License-Identifier: GPL-2.0+
  */
 
 #include <linux/bitops.h>

drivers/watchdog/sbc_fitpc2_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Watchdog driver for SBC-FITPC2 board
  *
···
  *
  * Adapted from the IXP2000 watchdog driver by Deepak Saxena.
  *
- * This file is licensed under  the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME " WATCHDOG: " fmt

drivers/watchdog/ts4800_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Watchdog driver for TS-4800 based boards
  *
  * Copyright (c) 2015 - Savoir-faire Linux
  *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #include <linux/kernel.h>

drivers/watchdog/ts72xx_wdt.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Watchdog driver for Technologic Systems TS-72xx based SBCs
  * (TS-7200, TS-7250 and TS-7260). These boards have external
···
  *
  * This driver is based on ep93xx_wdt and wm831x_wdt drivers.
  *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #include <linux/platform_device.h>