INT0_GMAC1
sc->sc_int_select[0] = INT0_GMAC1;
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GMAC_INT0_SELECT, INT0_GMAC1);
sc->sc_int_mask[0] = (sc->sc_port1 ? INT0_GMAC1 : INT0_GMAC0);