platform/x86: think-lmi: Make kobj_type structure constant

Since commit ee6d3dd ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.

Take advantage of this to constify the structure definition to prevent
modification at runtime.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://lore.kernel.org/r/20230207-kobj_type-pdx86-v1-2-8e2c4fb83105@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/think-lmi.c

@@ -1089,12 +1089,12 @@ static void tlmi_pwd_setting_release(struct kobject *kobj)
 	kfree(setting);
 }
 
-static struct kobj_type tlmi_attr_setting_ktype = {
+static const struct kobj_type tlmi_attr_setting_ktype = {
 	.release        = &tlmi_attr_setting_release,
 	.sysfs_ops	= &tlmi_kobj_sysfs_ops,
 };
 
-static struct kobj_type tlmi_pwd_setting_ktype = {
+static const struct kobj_type tlmi_pwd_setting_ktype = {
 	.release        = &tlmi_pwd_setting_release,
 	.sysfs_ops	= &tlmi_kobj_sysfs_ops,
 };