[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/hpwdt.c b/drivers/watchdog/hpwdt.c
index a6c5674..70c2c24 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -554,7 +554,7 @@
 	return len;
 }
 
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
 	.options = WDIOF_SETTIMEOUT |
 		   WDIOF_KEEPALIVEPING |
 		   WDIOF_MAGICCLOSE,