INT3_GMAC1
sc->sc_int_select[3] = INT3_GMAC1;
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GMAC_INT3_SELECT, INT3_GMAC1);
sc->sc_int_mask[3] = (sc->sc_port1 ? INT3_GMAC1 : INT3_GMAC0);