__of_find_node_by_path
node = __of_find_node_by_path(node, path);
struct device_node *__of_find_node_by_path(const struct device_node *parent,
fragment_node = __of_find_node_by_path(ovcs->overlay_root, path + 1);
overlay_node = __of_find_node_by_path(fragment_node, "__overlay__/");