[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/addrconf.c b/net/ipv6/addrconf.c
index 052f99e..b41c5d8 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -232,7 +232,7 @@
 
 int __ipv6_addr_type(const struct in6_addr *addr)
 {
-	u32 st;
+	__be32 st;
 
 	st = addr->s6_addr32[0];