drm/mipi_dsi: create dsi devices only for nodes with reg property

MIPI DSI host node can contain child nodes which are not DSI devices.
Checking for existence of reg property can be used to distinguish such nodes.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/drm_mipi_dsi.c

@@ -142,8 +142,12 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host)
 {
 	struct device_node *node;
 
-	for_each_available_child_of_node(host->dev->of_node, node)
+	for_each_available_child_of_node(host->dev->of_node, node) {
+		/* skip nodes without reg property */
+		if (!of_find_property(node, "reg", NULL))
+			continue;
 		of_mipi_dsi_device_add(host, node);
+	}
 
 	return 0;
 }