[media] tm6000: add poll op for radio device node

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index ac25885..f41dbb1 100644
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -1583,6 +1583,7 @@
 static const struct v4l2_file_operations radio_fops = {
 	.owner		= THIS_MODULE,
 	.open		= tm6000_open,
+	.poll		= v4l2_ctrl_poll,
 	.release	= tm6000_release,
 	.unlocked_ioctl	= video_ioctl2,
 };