media: v4l: async: Drop unneeded list entry initialisation

The list entry is initialised as a head in v4l2_async_register_subdev()
just before being added to the list. This isn't needed, drop the
initialisation.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de> # imx6qp
Tested-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> # rcar + adv746x
Tested-by: Aishwarya Kothari <aishwarya.kothari@toradex.com> # Apalis i.MX6Q with TC358743
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # Renesas RZ/G2L SMARC
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/v4l2-core/v4l2-async.c

@@ -782,8 +782,6 @@ int v4l2_async_register_subdev(struct v4l2_subdev *sd)
 
 	mutex_lock(&list_lock);
 
-	INIT_LIST_HEAD(&sd->async_list);
-
 	list_for_each_entry(notifier, &notifier_list, notifier_entry) {
 		struct v4l2_device *v4l2_dev =
 			v4l2_async_nf_find_v4l2_dev(notifier);