MXL86110_EXTD_REG_ADDR_DATA
return __phy_write(phydev, MXL86110_EXTD_REG_ADDR_DATA, val);
return __phy_read(phydev, MXL86110_EXTD_REG_ADDR_DATA);
return __phy_modify(phydev, MXL86110_EXTD_REG_ADDR_DATA, mask, set);