drivers: net: generalize napi_complete_done()

napi_complete_done() allows to opt-in for gro_flush_timeout,
added back in linux-3.19, commit 3b47d30396ba
("net: gro: add a per device gro flush timer")

This allows for more efficient GRO aggregation without
sacrifying latencies.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sfc/falcon/efx.c b/drivers/net/ethernet/sfc/falcon/efx.c
index 8cfbe01..c4ff3bb 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.c
+++ b/drivers/net/ethernet/sfc/falcon/efx.c
@@ -327,7 +327,7 @@ static int ef4_poll(struct napi_struct *napi, int budget)
 		 * since ef4_nic_eventq_read_ack() will have no effect if
 		 * interrupts have already been disabled.
 		 */
-		napi_complete(napi);
+		napi_complete_done(napi, spent);
 		ef4_nic_eventq_read_ack(channel);
 	}