net: lantiq_xrx200: fix statistics of received bytes

stable inclusion
from stable-v5.10.90
commit 8d70dc0eecf0fb1f1d6980fd525243afb69e3e0e
bugzilla: 186168 https://gitee.com/openeuler/kernel/issues/I4SHY1

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8d70dc0eecf0fb1f1d6980fd525243afb69e3e0e

--------------------------------

[ Upstream commit 5be60a94 ]

Received frames have FCS truncated. There is no need
to subtract FCS length from the statistics.

Fixes: fe1a5642 ("net: lantiq: Add Lantiq / Intel VRX200 Ethernet driver")
Signed-off-by: NAleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/lantiq_xrx200.c

@@ -209,7 +209,7 @@ static int xrx200_hw_receive(struct xrx200_chan *ch)
 	skb->protocol = eth_type_trans(skb, net_dev);
 	netif_receive_skb(skb);
 	net_dev->stats.rx_packets++;
-	net_dev->stats.rx_bytes += len - ETH_FCS_LEN;
+	net_dev->stats.rx_bytes += len;
 
 	return 0;
 }