uvc_xu_node_info
struct uvc_xu_node_info *node_info_xu = NULL;
node_info_xu = (struct uvc_xu_node_info*)topo_node->node_info;
node_info_size = sizeof(struct uvc_xu_node_info);
struct uvc_xu_node_info* node_info = (struct uvc_xu_node_info* )topo_node->node_info;