enet_intr_establish
sc->sc_ih = enet_intr_establish(sc, phandle, 0);
sc->sc_ih2 = enet_intr_establish(sc, phandle, 1);
sc->sc_ih3 = enet_intr_establish(sc, phandle, 2);
static void *enet_intr_establish(struct enet_softc *, int, u_int);