[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>

drivers/char/watchdog/omap_wdt.c

@@ -197,7 +197,7 @@ omap_wdt_ioctl(struct inode *inode, struct file *file,
 
 	switch (cmd) {
 	default:
-		return -ENOIOCTLCMD;
+		return -ENOTTY;
 	case WDIOC_GETSUPPORT:
 		return copy_to_user((struct watchdog_info __user *)arg, &ident,
 				sizeof(ident));