[media] v4l2-async: Use proper list head for iteration over registered subdevs

This fixes regression introduced in commit b426b3a660c85faf6e1ca1c92c6d
[media] V4L: Merge struct v4l2_async_subdev_list with struct v4l2_subdev

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 10bb62c..c85d69d 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -199,7 +199,7 @@
 
 	list_del(&notifier->list);
 
-	list_for_each_entry_safe(sd, tmp, &notifier->done, list) {
+	list_for_each_entry_safe(sd, tmp, &notifier->done, async_list) {
 		dev[i] = get_device(sd->dev);
 
 		v4l2_async_cleanup(sd);