KHO_FDT_SUB_TREE_PROP_NAME
val = fdt_getprop(fdt, offset, KHO_FDT_SUB_TREE_PROP_NAME, &len);
err = fdt_setprop(root_fdt, off, KHO_FDT_SUB_TREE_PROP_NAME,
val = fdt_getprop(root_fdt, off, KHO_FDT_SUB_TREE_PROP_NAME, &len);