net: Convert all sysctl registrations to register_net_sysctl

This results in code with less boiler plate that is a bit easier
to read.

Additionally stops us from using compatibility code in the sysctl
core, hastening the day when the compatibility code can be removed.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/x25/sysctl_net_x25.c

@@ -73,15 +73,9 @@ static struct ctl_table x25_table[] = {
 	{ 0, },
 };
 
-static struct ctl_path x25_path[] = {
-	{ .procname = "net", },
-	{ .procname = "x25", },
-	{ }
-};
-
 void __init x25_register_sysctl(void)
 {
-	x25_table_header = register_net_sysctl_table(&init_net, x25_path, x25_table);
+	x25_table_header = register_net_sysctl(&init_net, "net/x25", x25_table);
 }
 
 void x25_unregister_sysctl(void)