ixgbe: use skb_get_queue_mapping in tx path

Use the common api, and don't access queue_mapping directly.
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -8748,7 +8748,7 @@ static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
 	if (skb_put_padto(skb, 17))
 		return NETDEV_TX_OK;
 
-	tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping];
+	tx_ring = ring ? ring : adapter->tx_ring[skb_get_queue_mapping(skb)];
 	if (unlikely(test_bit(__IXGBE_TX_DISABLED, &tx_ring->state)))
 		return NETDEV_TX_BUSY;