oce_mbox_cmd_set_loopback
int oce_mbox_cmd_set_loopback(POCE_SOFTC sc, uint8_t port_num,
oce_mbox_cmd_set_loopback(sc, sc->if_id, loopback_type, 1);
oce_mbox_cmd_set_loopback(sc, sc->if_id, OCE_NO_LOOPBACK, 1);