utsname: simplify one-level sysctl registration for uts_kern_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.
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

kernel/utsname_sysctl.c

@@ -123,15 +123,6 @@ static struct ctl_table uts_kern_table[] = {
 	{}
 };
 
-static struct ctl_table uts_root_table[] = {
-	{
-		.procname	= "kernel",
-		.mode		= 0555,
-		.child		= uts_kern_table,
-	},
-	{}
-};
-
 #ifdef CONFIG_PROC_SYSCTL
 /*
  * Notify userspace about a change in a certain entry of uts_kern_table,
@@ -147,7 +138,7 @@ void uts_proc_notify(enum uts_proc proc)
 
 static int __init utsname_sysctl_init(void)
 {
-	register_sysctl_table(uts_root_table);
+	register_sysctl("kernel", uts_kern_table);
 	return 0;
 }