watchdog: bcm2835_wdt: constify _ops and _info structures

These are never modified, so might as well be const.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/bcm2835_wdt.c

@@ -96,7 +96,7 @@ static unsigned int bcm2835_wdt_get_timeleft(struct watchdog_device *wdog)
 	return WDOG_TICKS_TO_SECS(ret & PM_WDOG_TIME_SET);
 }
 
-static struct watchdog_ops bcm2835_wdt_ops = {
+static const struct watchdog_ops bcm2835_wdt_ops = {
 	.owner =	THIS_MODULE,
 	.start =	bcm2835_wdt_start,
 	.stop =		bcm2835_wdt_stop,
@@ -104,7 +104,7 @@ static struct watchdog_ops bcm2835_wdt_ops = {
 	.get_timeleft =	bcm2835_wdt_get_timeleft,
 };
 
-static struct watchdog_info bcm2835_wdt_info = {
+static const struct watchdog_info bcm2835_wdt_info = {
 	.options =	WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE |
 			WDIOF_KEEPALIVEPING,
 	.identity =	"Broadcom BCM2835 Watchdog timer",