net: ena: ethtool: get_channels: use combined only

Since we use the same IRQ and NAPI to service RX and TX then we need to
use a combined channel instead of rx and tx channels.
Signed-off-by: NSameeh Jubran <sameehj@amazon.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/amazon/ena/ena_ethtool.c

@@ -734,14 +734,8 @@ static void ena_get_channels(struct net_device *netdev,
 {
 	struct ena_adapter *adapter = netdev_priv(netdev);
 
-	channels->max_rx = adapter->num_io_queues;
-	channels->max_tx = adapter->num_io_queues;
-	channels->max_other = 0;
-	channels->max_combined = 0;
-	channels->rx_count = adapter->num_io_queues;
-	channels->tx_count = adapter->num_io_queues;
-	channels->other_count = 0;
-	channels->combined_count = 0;
+	channels->max_combined = adapter->num_io_queues;
+	channels->combined_count = adapter->num_io_queues;
 }
 
 static int ena_get_tunable(struct net_device *netdev,