net: phy: at803x: use phy_modify()

Convert at803x_set_wol to use phy_modify.
Signed-off-by: Luo Jie <luoj@codeaurora.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/at803x.c

@@ -357,16 +357,12 @@ static int at803x_set_wol(struct phy_device *phydev,
 			phy_write_mmd(phydev, MDIO_MMD_PCS, offsets[i],
 				      mac[(i * 2) + 1] | (mac[(i * 2)] << 8));
 
-		value = phy_read(phydev, AT803X_INTR_ENABLE);
-		value |= AT803X_INTR_ENABLE_WOL;
-		ret = phy_write(phydev, AT803X_INTR_ENABLE, value);
+		ret = phy_modify(phydev, AT803X_INTR_ENABLE, 0, AT803X_INTR_ENABLE_WOL);
 		if (ret)
 			return ret;
 		value = phy_read(phydev, AT803X_INTR_STATUS);
 	} else {
-		value = phy_read(phydev, AT803X_INTR_ENABLE);
-		value &= (~AT803X_INTR_ENABLE_WOL);
-		ret = phy_write(phydev, AT803X_INTR_ENABLE, value);
+		ret = phy_modify(phydev, AT803X_INTR_ENABLE, AT803X_INTR_ENABLE_WOL, 0);
 		if (ret)
 			return ret;
 		value = phy_read(phydev, AT803X_INTR_STATUS);