[WATCHDOG] watchdog_info constify

make the watchdog_info struct const where possible.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/pika_wdt.c b/drivers/watchdog/pika_wdt.c
index 2d22e99..435ec2a 100644
--- a/drivers/watchdog/pika_wdt.c
+++ b/drivers/watchdog/pika_wdt.c
@@ -52,7 +52,7 @@
 	struct timer_list timer;	/* The timer that pings the watchdog */
 } pikawdt_private;
 
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
 	.identity	= DRV_NAME,
 	.options	= WDIOF_CARDRESET |
 			  WDIOF_SETTIMEOUT |