[NETNS][IPV6] udp6 - make proc per namespace

The proc init/exit functions take a new network namespace parameter in
order to register/unregister /proc/net/udp6 for a namespace.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 8db06af..e01a563 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -597,8 +597,8 @@
 extern void raw6_proc_exit(void);
 extern int  tcp6_proc_init(void);
 extern void tcp6_proc_exit(void);
-extern int  udp6_proc_init(void);
-extern void udp6_proc_exit(void);
+extern int  udp6_proc_init(struct net *net);
+extern void udp6_proc_exit(struct net *net);
 extern int  udplite6_proc_init(void);
 extern void udplite6_proc_exit(void);
 extern int  ipv6_misc_proc_init(void);