[NETNS][FRAGS]: Make the nqueues counter per-namespace.

This is simple - just move the variable from struct inet_frags
to struct netns_frags and adjust the usage appropriately.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip.h b/include/net/ip.h
index 9d43ac2..fbe2830 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -332,7 +332,7 @@
 
 int ip_defrag(struct sk_buff *skb, u32 user);
 int ip_frag_mem(void);
-int ip_frag_nqueues(void);
+int ip_frag_nqueues(struct net *net);
 
 /*
  *	Functions provided by ip_forward.c