[media] cx23885: map invalid fields to a valid field

If field format is not valid, map it as V4L2_FIELD_INTERLACED,
instead of pretending to support an invalid format.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/pci/cx23885/cx23885-video.c b/drivers/media/pci/cx23885/cx23885-video.c
index ad02912..9bb19fd 100644
--- a/drivers/media/pci/cx23885/cx23885-video.c
+++ b/drivers/media/pci/cx23885/cx23885-video.c
@@ -948,7 +948,8 @@
 	case V4L2_FIELD_INTERLACED:
 		break;
 	default:
-		return -EINVAL;
+		field = V4L2_FIELD_INTERLACED;
+		break;
 	}
 
 	f->fmt.pix.field = field;