sfc: fix ARFS expiry check on EF10

Owing to a missing conditional, the result of rps_may_expire_flow() was
 being ignored and filters were being removed even if we'd decided not to
 expire them.

Fixes: f8d62037 ("sfc: ARFS filter IDs")
Signed-off-by: NEdward Cree <ecree@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/ef10.c

@@ -4784,6 +4784,7 @@ static bool efx_ef10_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id,
 	 * will set rule->filter_id to EFX_ARFS_FILTER_ID_PENDING, meaning that
 	 * the rule is not removed by efx_rps_hash_del() below.
 	 */
+	if (ret)
 		ret = efx_ef10_filter_remove_internal(efx, 1U << spec->priority,
 						      filter_idx, true) == 0;
 	/* While we can't safely dereference rule (we dropped the lock), we can