tsnep: Fix ethtool channels

According to the NAPI documentation networking/napi.rst, for the ethtool
API a channel is a IRQ/NAPI which services queues of a given type.

tsnep uses a single IRQ/NAPI instance for every TX/RX queue pair.
Therefore, combined channels shall be returned instead of separate tx/rx
channels.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/engleder/tsnep_ethtool.c

@@ -300,10 +300,8 @@ static void tsnep_ethtool_get_channels(struct net_device *netdev,
 {
 	struct tsnep_adapter *adapter = netdev_priv(netdev);
 
-	ch->max_rx = adapter->num_rx_queues;
-	ch->max_tx = adapter->num_tx_queues;
-	ch->rx_count = adapter->num_rx_queues;
-	ch->tx_count = adapter->num_tx_queues;
+	ch->max_combined = adapter->num_queues;
+	ch->combined_count = adapter->num_queues;
 }
 
 static int tsnep_ethtool_get_ts_info(struct net_device *netdev,