se_add_proto
static int se_add_proto(struct se_softc *, int);
(error = se_add_proto(sc, ETHERTYPE_IP)) != 0)
(error = se_add_proto(sc, ETHERTYPE_ARP)) != 0)
(error = se_add_proto(sc, ETHERTYPE_REVARP)) != 0)
(error = se_add_proto(sc, ETHERTYPE_ATALK)) != 0)
(error = se_add_proto(sc, ETHERTYPE_AARP)) != 0)