of: property: use new of_graph functions

Current of_graph_get_next_endpoint() can be replaced by using
new of_graph_get_next_port().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87iktib5t0.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

drivers/of/property.c

@@ -717,13 +717,7 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 	 * parent port node.
 	 */
 	if (!prev) {
-		struct device_node *node __free(device_node) =
-			of_get_child_by_name(parent, "ports");
-
-		if (node)
-			parent = node;
-
-		port = of_get_child_by_name(parent, "port");
+		port = of_graph_get_next_port(parent, NULL);
 		if (!port) {
 			pr_debug("graph: no port node found in %pOF\n", parent);
 			return NULL;
@@ -741,7 +735,7 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 		 * getting the next child. If the previous endpoint is NULL this
 		 * will return the first child.
 		 */
-		endpoint = of_get_next_child(port, prev);
+		endpoint = of_graph_get_next_port_endpoint(port, prev);
 		if (endpoint) {
 			of_node_put(port);
 			return endpoint;
@@ -750,11 +744,9 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 		/* No more endpoints under this port, try the next one. */
 		prev = NULL;
 
-		do {
-			port = of_get_next_child(parent, port);
-			if (!port)
-				return NULL;
-		} while (!of_node_name_eq(port, "port"));
+		port = of_graph_get_next_port(parent, port);
+		if (!port)
+			return NULL;
 	}
 }
 EXPORT_SYMBOL(of_graph_get_next_endpoint);