net: phy: marvell: Fix build.

Local variable 'autoneg' doesn't even exist:

drivers/net/phy/marvell.c: In function 'm88e1121_config_aneg':
drivers/net/phy/marvell.c:468:25: error: 'autoneg' undeclared (first use in this function); did you mean 'put_net'?
  if (phydev->autoneg != autoneg || changed) {
                         ^~~~~~~

Fixes: d6ab9336 ("net: phy: marvell: Avoid unnecessary soft reset")
Reported-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/marvell.c

@@ -465,7 +465,7 @@ static int m88e1121_config_aneg(struct phy_device *phydev)
 	if (err < 0)
 		return err;
 
-	if (phydev->autoneg != autoneg || changed) {
+	if (phydev->autoneg != AUTONEG_ENABLE || changed) {
 		/* A software reset is used to ensure a "commit" of the
 		 * changes is done.
 		 */