platform/x86: think-lmi: Move pending_reboot_attr to the attributes sysfs dir

Move the pending_reboot node under attributes dir where it should live, as
documented in: Documentation/ABI/testing/sysfs-class-firmware-attributes.

Also move the create / remove code to be together with the other code
populating / cleaning the attributes sysfs dir. In the removal path this
is necessary so that the remove is done before the
kset_unregister(tlmi_priv.attribute_kset) call.
Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Co-developed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210717143607.3580-1-hdegoede@redhat.com

drivers/platform/x86/think-lmi.c

@@ -672,6 +672,7 @@ static void tlmi_release_attr(void)
 			kobject_put(&tlmi_priv.setting[i]->kobj);
 		}
 	}
+	sysfs_remove_file(&tlmi_priv.attribute_kset->kobj, &pending_reboot.attr);
 	kset_unregister(tlmi_priv.attribute_kset);
 
 	/* Authentication structures */
@@ -680,7 +681,6 @@ static void tlmi_release_attr(void)
 	sysfs_remove_group(&tlmi_priv.pwd_power->kobj, &auth_attr_group);
 	kobject_put(&tlmi_priv.pwd_power->kobj);
 	kset_unregister(tlmi_priv.authentication_kset);
-	sysfs_remove_file(&tlmi_priv.class_dev->kobj, &pending_reboot.attr);
 }
 
 static int tlmi_sysfs_init(void)
@@ -733,6 +733,10 @@ static int tlmi_sysfs_init(void)
 			goto fail_create_attr;
 	}
 
+	ret = sysfs_create_file(&tlmi_priv.attribute_kset->kobj, &pending_reboot.attr);
+	if (ret)
+		goto fail_create_attr;
+
 	/* Create authentication entries */
 	tlmi_priv.authentication_kset = kset_create_and_add("authentication", NULL,
 								&tlmi_priv.class_dev->kobj);
@@ -760,11 +764,6 @@ static int tlmi_sysfs_init(void)
 	if (ret)
 		goto fail_create_attr;
 
-	/* Create global sysfs files */
-	ret = sysfs_create_file(&tlmi_priv.class_dev->kobj, &pending_reboot.attr);
-	if (ret)
-		goto fail_create_attr;
-
 	return ret;
 
 fail_create_attr: