MAF_HI
ret = lan78xx_write_reg(dev, MAF_HI(i), 0);
ret = lan78xx_write_reg(dev, MAF_HI(i),
ret = lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
return lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);