s390/qeth: switch to napi_gro_receive

Add support for GRO (generic receive offload) in the layer 2
part of device driver qeth. This results in a performance
improvement when GRO and RX is turned on.
Signed-off-by: NThomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: NUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_l2_main.c

@@ -511,7 +511,7 @@ static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 			if (skb->protocol == htons(ETH_P_802_2))
 				*((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 			len = skb->len;
-			netif_receive_skb(skb);
+			napi_gro_receive(&card->napi, skb);
 			break;
 		case QETH_HEADER_TYPE_OSN:
 			if (card->info.type == QETH_CARD_TYPE_OSN) {