e1000: use netif_tx_disable

we can use netif_tx_disable now because LLTX has been removed.
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: NDon Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/e1000/e1000_main.c

@@ -485,8 +485,7 @@ void e1000_down(struct e1000_adapter *adapter)
 	ew32(RCTL, rctl & ~E1000_RCTL_EN);
 	/* flush and sleep below */
 
-	/* can be netif_tx_disable when NETIF_F_LLTX is removed */
-	netif_stop_queue(netdev);
+	netif_tx_disable(netdev);
 
 	/* disable transmits in the hardware */
 	tctl = er32(TCTL);