uath_read_eeprom
int uath_read_eeprom(struct uath_softc *, uint32_t, void *);
error = uath_read_eeprom(sc, UATH_EEPROM_MACADDR, sc->sc_ic.ic_myaddr);
error = uath_read_eeprom(sc, UATH_EEPROM_RXBUFSZ, &tmp);