[NETFILTER]: Use the ctl paths instead of hand-made analogue

The conntracks subsystem has a similar infrastructure
to maintain ctl_paths, but since we already have it
on the generic level, I think it's OK to switch to
using it.

So, basically, this patch just replaces the ctl_table-s
with ctl_path-s, nf_register_sysctl_table with
register_sysctl_paths() and removes no longer needed code.

After this the net/netfilter/nf_sysctl.c file contains
the paths only.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index d190d56..c41f643 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -120,12 +120,8 @@
 
 #ifdef CONFIG_SYSCTL
 /* Sysctl registration */
-struct ctl_table_header *nf_register_sysctl_table(struct ctl_table *path,
-						  struct ctl_table *table);
-void nf_unregister_sysctl_table(struct ctl_table_header *header,
-				struct ctl_table *table);
-extern struct ctl_table nf_net_netfilter_sysctl_path[];
-extern struct ctl_table nf_net_ipv4_netfilter_sysctl_path[];
+extern struct ctl_path nf_net_netfilter_sysctl_path[];
+extern struct ctl_path nf_net_ipv4_netfilter_sysctl_path[];
 #endif /* CONFIG_SYSCTL */
 
 extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];