RX_ADDRH
ret = lan78xx_read_reg(dev, RX_ADDRH, &addr_hi);
ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);