[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/include/net/ip6_route.h b/include/net/ip6_route.h
index c14b70e..4e927eb 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -20,7 +20,7 @@
 				route_pref:2,
 				reserved_h:3;
 #endif
-	__u32			lifetime;
+	__be32			lifetime;
 	__u8			prefix[0];	/* 0,8 or 16 */
 };