bridge br_multicast: IPv6 MLD support.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 45d11e4..018499e 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -49,6 +49,9 @@
 {
 	union {
 		__be32	ip4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+		struct in6_addr ip6;
+#endif
 	} u;
 	__be16		proto;
 };