marvell_set_polarity
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);
err = marvell_set_polarity(phydev, phydev->mdix_ctrl);