sunrpc: simplify one-level sysctl registration for debug_table

There is no need to declare an extra tables to just create directory,
this can be easily be done with a prefix path with register_sysctl().

Simplify this registration.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/sysctl.c

@@ -163,20 +163,11 @@ static struct ctl_table debug_table[] = {
 	{ }
 };
 
-static struct ctl_table sunrpc_table[] = {
-	{
-		.procname	= "sunrpc",
-		.mode		= 0555,
-		.child		= debug_table
-	},
-	{ }
-};
-
 void
 rpc_register_sysctl(void)
 {
 	if (!sunrpc_table_header)
-		sunrpc_table_header = register_sysctl_table(sunrpc_table);
+		sunrpc_table_header = register_sysctl("sunrpc", debug_table);
 }
 
 void