loadpin: simplify sysctls use with register_sysctl()

register_sysctl_paths() is not required, we can just use
register_sysctl() with the required path specified.
Reviewed-by: John Johansen <john.johansen@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

security/loadpin/loadpin.c

@@ -52,12 +52,6 @@ static bool deny_reading_verity_digests;
 #endif
 
 #ifdef CONFIG_SYSCTL
-static struct ctl_path loadpin_sysctl_path[] = {
-	{ .procname = "kernel", },
-	{ .procname = "loadpin", },
-	{ }
-};
-
 static struct ctl_table loadpin_sysctl_table[] = {
 	{
 		.procname       = "enforce",
@@ -262,7 +256,7 @@ static int __init loadpin_init(void)
 		enforce ? "" : "not ");
 	parse_exclude();
 #ifdef CONFIG_SYSCTL
-	if (!register_sysctl_paths(loadpin_sysctl_path, loadpin_sysctl_table))
+	if (!register_sysctl("kernel/loadpin", loadpin_sysctl_table))
 		pr_notice("sysctl registration failed!\n");
 #endif
 	security_add_hooks(loadpin_hooks, ARRAY_SIZE(loadpin_hooks), "loadpin");