sunrpc: simplify one-level sysctl registration for xs_tunables_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/xprtsock.c

@@ -78,7 +78,7 @@ static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO;
 
 /*
  * We can register our own files under /proc/sys/sunrpc by
- * calling register_sysctl_table() again.  The files in that
+ * calling register_sysctl() again.  The files in that
  * directory become the union of all files registered there.
  *
  * We simply need to make sure that we don't collide with
@@ -158,15 +158,6 @@ static struct ctl_table xs_tunables_table[] = {
 	{ },
 };
 
-static struct ctl_table sunrpc_table[] = {
-	{
-		.procname	= "sunrpc",
-		.mode		= 0555,
-		.child		= xs_tunables_table
-	},
-	{ },
-};
-
 /*
  * Wait duration for a reply from the RPC portmapper.
  */
@@ -3178,7 +3169,7 @@ static struct xprt_class	xs_bc_tcp_transport = {
 int init_socket_xprt(void)
 {
 	if (!sunrpc_table_header)
-		sunrpc_table_header = register_sysctl_table(sunrpc_table);
+		sunrpc_table_header = register_sysctl("sunrpc", xs_tunables_table);
 
 	xprt_register_transport(&xs_local_transport);
 	xprt_register_transport(&xs_udp_transport);