drm/rcar-du: Rename async to nonblock.

The async name is deprecated and should be changed to nonblocking.

Cc: Laurent Pinchart <[e-mail]>
Signed-off-by: Maarten Lankhorst <[e-mail]>
Acked-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/rcar-du/rcar_du_kms.c

···
 }
 
 static int rcar_du_atomic_commit(struct drm_device *dev,
-				 struct drm_atomic_state *state, bool async)
+				 struct drm_atomic_state *state,
+				 bool nonblock)
 {
 	struct rcar_du_device *rcdu = dev->dev_private;
 	struct rcar_du_commit *commit;
···
 	/* Swap the state, this is the point of no return. */
 	drm_atomic_helper_swap_state(dev, state);
 
-	if (async)
+	if (nonblock)
 		schedule_work(&commit->work);
 	else
 		rcar_du_atomic_complete(commit);