fdt_get_property_w
*prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
prop = fdt_get_property_w(fdt, nodeoffset, name, &len);