sxie_miibus_readreg
int sxie_miibus_readreg(struct device *, int, int);
mii->mii_readreg = sxie_miibus_readreg;
set_m |= sxie_miibus_readreg(dev, sc->sc_phyno, 0) >> 8 & 1;
sxie_miibus_readreg(dev, sc->sc_phyno, 0) & ~(1 << 11));
phyreg = sxie_miibus_readreg(dev, sc->sc_phyno, 0);