net: phy: c22: migrate to genphy_c45_write_eee_adv()

Migrate from genphy_config_eee_advert() to genphy_c45_write_eee_adv().

It should work as before except write operation to the EEE adv registers
will be done only if some EEE abilities was detected.

If some driver will have a regression, related driver should provide own
.get_features callback. See micrel.c:ksz9477_get_features() as example.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phy_device.c

@@ -2231,7 +2231,10 @@ int __genphy_config_aneg(struct phy_device *phydev, bool changed)
 {
 	int err;
 
-	if (genphy_config_eee_advert(phydev))
+	err = genphy_c45_write_eee_adv(phydev, phydev->supported_eee);
+	if (err < 0)
+		return err;
+	else if (err)
 		changed = true;
 
 	err = genphy_setup_master_slave(phydev);
@@ -2653,6 +2656,11 @@ int genphy_read_abilities(struct phy_device *phydev)
 				 phydev->supported, val & ESTATUS_1000_XFULL);
 	}
 
+	/* This is optional functionality. If not supported, we may get an error
+	 * which should be ignored.
+	 */
+	genphy_c45_read_eee_abilities(phydev);
+
 	return 0;
 }
 EXPORT_SYMBOL(genphy_read_abilities);