[WATCHDOG] Correct WDIOF_MAGICCLOSE flag

Make sure that when the WDIOF_MAGICCLOSE flag is set we also
support the magic-close feature...

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

diff --git a/drivers/watchdog/sb_wdog.c b/drivers/watchdog/sb_wdog.c
index bc3d68f..9748eed 100644
--- a/drivers/watchdog/sb_wdog.c
+++ b/drivers/watchdog/sb_wdog.c
@@ -93,7 +93,7 @@
 
 static const struct watchdog_info ident = {
 	.options	= WDIOF_CARDRESET | WDIOF_SETTIMEOUT |
-						WDIOF_KEEPALIVEPING,
+					WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
 	.identity	= "SiByte Watchdog",
 };