RDMA/hns: Logic optimization of wc_flags

We should set IB_WC_WITH_VLAN only when VLAN is enabled.
In addition, move setting of IB_WC_WITH_SMAC below
setting of wc->smac.
Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Link: https://lore.kernel.org/r/1565343666-73193-2-git-send-email-oulijun@huawei.comSigned-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -2860,15 +2860,16 @@ static int hns_roce_v2_poll_one(struct hns_roce_cq *hr_cq,
 		wc->smac[5] = roce_get_field(cqe->byte_28,
 					     V2_CQE_BYTE_28_SMAC_5_M,
 					     V2_CQE_BYTE_28_SMAC_5_S);
+		wc->wc_flags |= IB_WC_WITH_SMAC;
 		if (roce_get_bit(cqe->byte_28, V2_CQE_BYTE_28_VID_VLD_S)) {
 			wc->vlan_id = (u16)roce_get_field(cqe->byte_28,
 							  V2_CQE_BYTE_28_VID_M,
 							  V2_CQE_BYTE_28_VID_S);
+			wc->wc_flags |= IB_WC_WITH_VLAN;
 		} else {
 			wc->vlan_id = 0xffff;
 		}
 
-		wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
 		wc->network_hdr_type = roce_get_field(cqe->byte_28,
 						    V2_CQE_BYTE_28_PORT_TYPE_M,
 						    V2_CQE_BYTE_28_PORT_TYPE_S);