MDIO_AN_10GBT_STAT
reg = ef4_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);