[WATCHDOG] omap_wdt.c - default error for IOCTL is -ENOTTY

The default value for an unknown ioctl call is -ENOTTY.

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

diff --git a/drivers/char/watchdog/omap_wdt.c b/drivers/char/watchdog/omap_wdt.c
index 3a0e061..719b066 100644
--- a/drivers/char/watchdog/omap_wdt.c
+++ b/drivers/char/watchdog/omap_wdt.c
@@ -197,7 +197,7 @@
 
 	switch (cmd) {
 	default:
-		return -ENOIOCTLCMD;
+		return -ENOTTY;
 	case WDIOC_GETSUPPORT:
 		return copy_to_user((struct watchdog_info __user *)arg, &ident,
 				sizeof(ident));