[WATCHDOG] WDIOC_GETSTATUS and WDIOC_GETBOOTSTATUS clean-up

Add mandatory WDIOC_GETSTATUS and WDIOC_GETBOOTSTATUS ioctl's for
drivers that don't have them yet.

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

diff --git a/drivers/char/watchdog/machzwd.c b/drivers/char/watchdog/machzwd.c
index a0d2716..6d35bb1 100644
--- a/drivers/char/watchdog/machzwd.c
+++ b/drivers/char/watchdog/machzwd.c
@@ -321,6 +321,7 @@
 		break;
 
 	case WDIOC_GETSTATUS:
+	case WDIOC_GETBOOTSTATUS:
 		return put_user(0, p);
 
 	case WDIOC_KEEPALIVE: