ifmedia_match
if (ifmedia_match(&sc->sc_mii.mii_media, IFM_ETHER|IFM_MANUAL, 0))
else if (ifmedia_match(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO, 0))
if (!ifmedia_match(&sc->sc_media, media, sc->sc_media.ifm_mask))
int ifmedia_match(struct ifmedia *, uint64_t, uint64_t);