phylink: Fix an uninitialized variable bug

"ret" isn't necessarily initialized here.

Fixes: 9525ae83959b ("phylink: add phylink infrastructure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phylink.c

@@ -958,7 +958,7 @@ int phylink_ethtool_ksettings_set(struct phylink *pl,
 	}
 	mutex_unlock(&pl->state_mutex);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);