media: seco-cec: decrement HDMI device refcount

The SECO CEC driver never decremented the HDMI device refcount.
CEC drivers only need the HDMI device pointer as a key in the
notifier list, it never accesses the device, so there is no
need to keep a reference.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/seco-cec/seco-cec.c

@@ -536,6 +536,7 @@ static int secocec_cec_get_notifier(struct cec_notifier **notify)
 				return -EPROBE_DEFER;
 
 			*notify = cec_notifier_get_conn(d, m->conn);
+			put_device(d);
 
 			return 0;
 		}