[media] V4L: Rename subdev field of struct v4l2_async_notifier

This is a purely cosmetic change. Since the 'subdev' member
points to an array of subdevs make it more explicit by
renaming to the plural form.
Acked-and-tested-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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 9f91013..ed31a65 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -147,7 +147,7 @@
 	INIT_LIST_HEAD(&notifier->done);
 
 	for (i = 0; i < notifier->num_subdevs; i++) {
-		asd = notifier->subdev[i];
+		asd = notifier->subdevs[i];
 
 		switch (asd->match_type) {
 		case V4L2_ASYNC_MATCH_CUSTOM: