drm/sun4i: backend: Move the coord function in the shared part

The function supposed to update a plane's coordinates is called in both
branches of our function. Let's move it out the if statement.
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2cd57bcf13652109da7bd5bbe12fa1d29429f02f.1516617243.git-series.maxime.ripard@free-electrons.com

drivers/gpu/drm/sun4i/sun4i_layer.c

@@ -106,14 +106,13 @@ static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
 					      DRM_FORMAT_ARGB8888);
 		sun4i_backend_update_layer_frontend(backend, layer->id,
 						    DRM_FORMAT_ARGB8888);
-		sun4i_backend_update_layer_coord(backend, layer->id, plane);
 		sun4i_frontend_enable(frontend);
 	} else {
-		sun4i_backend_update_layer_coord(backend, layer->id, plane);
 		sun4i_backend_update_layer_formats(backend, layer->id, plane);
 		sun4i_backend_update_layer_buffer(backend, layer->id, plane);
 	}
 
+	sun4i_backend_update_layer_coord(backend, layer->id, plane);
 	sun4i_backend_layer_enable(backend, layer->id, true);
 }