[SK_BUFF]: Introduce tcp_hdr(), remove skb->h.th

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ioc3-eth.c b/drivers/net/ioc3-eth.c
index ba012e1..bc62e77 100644
--- a/drivers/net/ioc3-eth.c
+++ b/drivers/net/ioc3-eth.c
@@ -1426,7 +1426,7 @@
 		}
 		if (proto == IPPROTO_TCP) {
 			csoff += offsetof(struct tcphdr, check);
-			skb->h.th->check = csum;
+			tcp_hdr(skb)->check = csum;
 		}
 
 		w0 = ETXD_DOCHECKSUM | (csoff << ETXD_CHKOFF_SHIFT);