rtlgen_write_vend2
ret = rtlgen_write_vend2(phydev, regnum, val);
ret = rtlgen_write_vend2(phydev, regnum, RTL_MDIO_AN_EEE_ADV);
ret = rtlgen_write_vend2(phydev, RTL_MDIO_AN_EEE_ADV2, val);