V4L/DVB: ivtv: fix VIDIOC_S_PRIORITY handling

VIDIOC_S_PRIORITY is also part of the ioctls that need to check the
access priority.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/ivtv/ivtv-ioctl.c

@@ -1850,6 +1850,7 @@ static long ivtv_serialized_ioctl(struct ivtv *itv, struct file *filp,
 	case VIDIOC_S_AUDOUT:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_S_FBUF:
+	case VIDIOC_S_PRIORITY:
 	case VIDIOC_OVERLAY:
 		ret = v4l2_prio_check(&itv->prio, id->prio);
 		if (ret)