net: hns3: Remove io_stop_wc() calls after __iowrite64_copy()

BugLink: https://bugs.launchpad.net/bugs/2071655

Now that the ARM64 arch implementation does the DGH as part of
__iowrite64_copy() there is no reason to open code this in drivers.

Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Jijie Shao<[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
(cherry picked from commit 2b7a5e1)
Signed-off-by: Jamie Nguyen <[email protected]>
Acked-by: Brad Figg <[email protected]>
Acked-by: Noah Wager <[email protected]>
Acked-by: Jacob Martin <[email protected]>
Signed-off-by: Brad Figg <[email protected]>

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -2068,8 +2068,6 @@ static void hns3_tx_push_bd(struct hns3_enet_ring *ring, int num)
 	__iowrite64_copy(ring->tqp->mem_base, desc,
 			 (sizeof(struct hns3_desc) * HNS3_MAX_PUSH_BD_NUM) /
 			 HNS3_BYTES_PER_64BIT);
-
-	io_stop_wc();
 }
 
 static void hns3_tx_mem_doorbell(struct hns3_enet_ring *ring)
@@ -2088,8 +2086,6 @@ static void hns3_tx_mem_doorbell(struct hns3_enet_ring *ring)
 	u64_stats_update_begin(&ring->syncp);
 	ring->stats.tx_mem_doorbell += ring->pending_buf;
 	u64_stats_update_end(&ring->syncp);
-
-	io_stop_wc();
 }
 
 static void hns3_tx_doorbell(struct hns3_enet_ring *ring, int num,