netns: make udpv6 mib per/namespace

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netns/mib.h b/include/net/netns/mib.h
index ffcef5d..ba622b2 100644
--- a/include/net/netns/mib.h
+++ b/include/net/netns/mib.h
@@ -14,6 +14,7 @@
 
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 	struct proc_dir_entry *proc_net_devsnmp6;
+	DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6);
 #endif
 };