[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/pcwd.c b/drivers/watchdog/pcwd.c
index aa95123..06f7922 100644
--- a/drivers/watchdog/pcwd.c
+++ b/drivers/watchdog/pcwd.c
@@ -606,7 +606,7 @@
 	int temperature;
 	int new_heartbeat;
 	int __user *argp = (int __user *)arg;
-	static struct watchdog_info ident = {
+	static const struct watchdog_info ident = {
 		.options =		WDIOF_OVERHEAT |
 					WDIOF_CARDRESET |
 					WDIOF_KEEPALIVEPING |