[media] V4L2: drivers implementing vidioc_default should also return -ENOTTY

If the vidioc_default implementation doesn't support the ioctl, then drivers
must return -ENOTTY instead of -EINVAL.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/mxb.c b/drivers/media/video/mxb.c
index 2e41317..ca3f70f 100644
--- a/drivers/media/video/mxb.c
+++ b/drivers/media/video/mxb.c
@@ -688,7 +688,7 @@
 /*
 		DEB2(pr_err("does not handle this ioctl\n"));
 */
-		return -ENOIOCTLCMD;
+		return -ENOTTY;
 	}
 	return 0;
 }