net: hns3: fix to correctly fetch l4 protocol outer header

This patch fixes the function being used to fetch L4
protocol outer header. Mistakenly skb_inner_transport_header
API was being used earlier.

Fixes: 76ad4f0e ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NSalil Mehta <salil.mehta@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -502,7 +502,7 @@ static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
 
 	/* find outer header point */
 	l3.hdr = skb_network_header(skb);
-	l4_hdr = skb_inner_transport_header(skb);
+	l4_hdr = skb_transport_header(skb);
 
 	if (skb->protocol == htons(ETH_P_IPV6)) {
 		exthdr = l3.hdr + sizeof(*l3.v6);