sfc: Enable autonegotiated flow-control by default if supported

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 9d009c4..1e78585 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -909,6 +909,8 @@
 		efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
 	else
 		efx->wanted_fc = EFX_FC_RX;
+	if (efx->mdio.mmds & MDIO_DEVS_AN)
+		efx->wanted_fc |= EFX_FC_AUTO;
 
 	/* Allocate buffer for stats */
 	rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,