[IPV6]: Misc endianness annotations.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 204e021..f63fb86 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1481,7 +1481,8 @@
 		if (hp == NULL)
 			return -EBADMSG;
 		if (nexthdr == NEXTHDR_FRAGMENT) {
-			unsigned short _frag_off, *fp;
+			unsigned short _frag_off;
+			__be16 *fp;
 			fp = skb_header_pointer(skb,
 						start+offsetof(struct frag_hdr,
 							       frag_off),