net: lan743x: use netdev in lan743x_phylink_mac_link_down()

Use the netdev that we already have in lan743x_phylink_mac_link_down().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/E1tYAE5-0014Q5-Up@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Russell King (Oracle)

drivers/net/ethernet/microchip/lan743x_main.c

@@ -3029,7 +3029,7 @@ static void lan743x_phylink_mac_link_down(struct phylink_config *config,
 	struct net_device *netdev = to_net_dev(config->dev);
 	struct lan743x_adapter *adapter = netdev_priv(netdev);
 
-	netif_tx_stop_all_queues(to_net_dev(config->dev));
+	netif_tx_stop_all_queues(netdev);
 	lan743x_mac_eee_enable(adapter, false);
 }