[SK_BUFF]: unions of just one member don't get anything done, kill them

Renaming skb->h to skb->transport_header, skb->nh to skb->network_header and
skb->mac to skb->mac_header, to match the names of the associated helpers
(skb[_[re]set]_{transport,network,mac}_header).

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 3578942..50d0b301 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -597,7 +597,7 @@
 	msg->im_msgtype = assert;
 	igmp->code 	=	0;
 	ip_hdr(skb)->tot_len = htons(skb->len);			/* Fix the length */
-	skb->h.raw = skb->nh.raw;
+	skb->transport_header = skb->network_header;
 	}
 
 	if (mroute_socket == NULL) {
@@ -1102,7 +1102,7 @@
 	struct iphdr *old_iph = ip_hdr(skb);
 
 	skb_push(skb, sizeof(struct iphdr));
-	skb->h.raw = skb->nh.raw;
+	skb->transport_header = skb->network_header;
 	skb_reset_network_header(skb);
 	iph = ip_hdr(skb);
 
@@ -1461,7 +1461,7 @@
 	if (reg_dev == NULL)
 		goto drop;
 
-	skb->mac.raw = skb->nh.raw;
+	skb->mac_header = skb->network_header;
 	skb_pull(skb, (u8*)encap - skb->data);
 	skb_reset_network_header(skb);
 	skb->dev = reg_dev;
@@ -1517,7 +1517,7 @@
 	if (reg_dev == NULL)
 		goto drop;
 
-	skb->mac.raw = skb->nh.raw;
+	skb->mac_header = skb->network_header;
 	skb_pull(skb, (u8*)encap - skb->data);
 	skb_reset_network_header(skb);
 	skb->dev = reg_dev;