watchdog: WatchDog Timer Driver Core - Add WDIOC_SETOPTIONS ioctl

This part add's the WDIOC_SETOPTIONS ioctl functionality
to the WatchDog Timer Driver Core framework.

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>

include/linux/watchdog.h

@@ -106,6 +106,7 @@ struct watchdog_device {
 	void *driver_data;
 	unsigned long status;
 /* Bit numbers for status flags */
+#define WDOG_ACTIVE		0	/* Is the watchdog running/active */
 #define WDOG_DEV_OPEN		1	/* Opened via /dev/watchdog ? */
 };