net: renesas: rswitch: Use napi_gro_receive() in RX

This hardware can receive multiple frames so that using
napi_gro_receive() instead of netif_receive_skb() gets good
performance of RX.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/rswitch.c

@@ -729,7 +729,7 @@ static bool rswitch_rx(struct net_device *ndev, int *quota)
 		}
 		skb_put(skb, pkt_len);
 		skb->protocol = eth_type_trans(skb, ndev);
-		netif_receive_skb(skb);
+		napi_gro_receive(&rdev->napi, skb);
 		rdev->ndev->stats.rx_packets++;
 		rdev->ndev->stats.rx_bytes += pkt_len;