commands/splash: fix '-y' option handling

The '-y' and '-o' options are independent,
so just add missing 'break'.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands/splash.c

@@ -41,6 +41,7 @@ static int do_splash(int argc, char *argv[])
 			break;
 		case 'y':
 			s.y = simple_strtoul(optarg, NULL, 0);
+			break;
 		case 'o':
 			offscreen = 1;
 		}