fdt_get_phyaddr
if (fdt_get_phyaddr(child, NULL, &phy, NULL) != 0){
int fdt_get_phyaddr(phandle_t, device_t, int *, void **);
if (fdt_get_phyaddr(ofw_node, dev, &phynum, &dummy) != 0) {
if (fdt_get_phyaddr(sc->node, sc->dev, &phy, (void **)&sc->phy_sc) == 0) {