[media] bcm3510: fix handling of VSB16 modulation

There's a missing break for VSB16 modulation logic, with would
cause it to return -EINVAL, instead of handling it.

Fix it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/dvb-frontends/bcm3510.c

@@ -538,6 +538,7 @@ static int bcm3510_set_frontend(struct dvb_frontend *fe)
 			cmd.ACQUIRE0.MODE = 0x9;
 			cmd.ACQUIRE1.SYM_RATE = 0x0;
 			cmd.ACQUIRE1.IF_FREQ = 0x0;
+			break;
 		default:
 			return -EINVAL;
 	}