oce_rxf_set_promiscuous
rc = oce_rxf_set_promiscuous(sc, sc->promisc);
if (!oce_rxf_set_promiscuous(sc, (1 | (1 << 1))))
if (!oce_rxf_set_promiscuous(sc, 0))
int oce_rxf_set_promiscuous(POCE_SOFTC sc, uint8_t enable);
oce_rxf_set_promiscuous(sc, (1 << 1));