get_path
dt_ops.get_path = fdt_wrapper_get_path;
if (dt_ops.get_path)
return dt_ops.get_path(phandle, buf, len);
char *(*get_path)(const void *phandle, char *buf, int len);
path = get_path(node, prop_buf, MAX_PROP_LEN);
cur_path = get_path(src, dst);