fbdev: omapfb: use of_graph_get_remote_port()

We already have of_graph_get_remote_port(), Let's use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/omap2/omapfb/dss/dss-of.c

@@ -117,19 +117,6 @@ u32 dss_of_port_get_port_number(struct device_node *port)
 	return reg;
 }
 
-static struct device_node *omapdss_of_get_remote_port(const struct device_node *node)
-{
-	struct device_node *np;
-
-	np = of_graph_get_remote_endpoint(node);
-	if (!np)
-		return NULL;
-
-	np = of_get_next_parent(np);
-
-	return np;
-}
-
 struct omap_dss_device *
 omapdss_of_find_source_for_first_ep(struct device_node *node)
 {
@@ -141,7 +128,7 @@ omapdss_of_find_source_for_first_ep(struct device_node *node)
 	if (!ep)
 		return ERR_PTR(-EINVAL);
 
-	src_port = omapdss_of_get_remote_port(ep);
+	src_port = of_graph_get_remote_port(ep);
 	if (!src_port) {
 		of_node_put(ep);
 		return ERR_PTR(-EINVAL);