net: mana: Fix the tso_bytes calculation

sizeof(struct hop_jumbo_hdr) is not part of tso_bytes, so remove
the subtraction from header size.

Cc: stable@vger.kernel.org
Fixes: bd7fc6e1 ("net: mana: Add new MANA VF performance counters for easier troubleshooting")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/microsoft/mana/mana_en.c

@@ -264,8 +264,6 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 				ihs = skb_transport_offset(skb) + sizeof(struct udphdr);
 			} else {
 				ihs = skb_tcp_all_headers(skb);
-				if (ipv6_has_hopopt_jumbo(skb))
-					ihs -= sizeof(struct hop_jumbo_hdr);
 			}
 
 			u64_stats_update_begin(&tx_stats->syncp);