V4L/DVB (8783): v4l: add all missing video_device release callbacks

All drivers that call video_device_register where checked to see if they
set the release callback of struct video_device. Where that callback was
missing it was added.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/se401.c b/drivers/media/video/se401.c
index d16bbf0..b01f25d 100644
--- a/drivers/media/video/se401.c
+++ b/drivers/media/video/se401.c
@@ -1236,6 +1236,7 @@
 static struct video_device se401_template = {
 	.name =         "se401 USB camera",
 	.fops =         &se401_fops,
+	.release = video_device_release_empty,
 };