net: phy: unlock on error in phy_probe()

If genphy_c45_read_eee_adv() fails then we need to do a reset and unlock
the &phydev->lock mutex before returning.

Fixes: 3eeca4e1 ("net: phy: do not force EEE support")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/Y/x/6kHCjnQHqOpF@kiliSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/phy/phy_device.c

@@ -3146,7 +3146,7 @@ static int phy_probe(struct device *dev)
 	 */
 	err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee);
 	if (err)
-		return err;
+		goto out;
 
 	/* There is no "enabled" flag. If PHY is advertising, assume it is
 	 * kind of enabled.