phy_enable_prop_idx
rv = phy_enable_prop_idx(sc->sc_node, "usb-phy", 0);
rv = phy_enable_prop_idx(sc->sc_node, "usb-phy", 1);
return (phy_enable_prop_idx(node, "phys", idx));
int phy_enable_prop_idx(int, char *, int);