V4L/DVB (6686): saa7134: fix composite over s-video input on the Tevion MD 9717

The vmux for composite over s-video input was wrong.
Signed-off-by: NHermann Pitton <hermann-pitton@arcor.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/saa7134/saa7134-cards.c

@@ -334,7 +334,7 @@ struct saa7134_board saa7134_boards[] = {
 			.tv   = 1,
 		},{
 			.name = name_comp1,
-			.vmux = 2,
+			.vmux = 0,
 			.amux = LINE1,
 		},{
 			.name = name_comp2,