[media] tuners/xc5000: fix MODE_AIR in xc5000_set_params()

There is a missing break so we use XC_RF_MODE_CABLE instead of
XC_RF_MODE_AIR.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index dc93cf3..d6be1b6 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -785,6 +785,7 @@
 			return -EINVAL;
 		}
 		priv->rf_mode = XC_RF_MODE_AIR;
+		break;
 	case SYS_DVBC_ANNEX_A:
 	case SYS_DVBC_ANNEX_C:
 		dprintk(1, "%s() QAM modulation\n", __func__);