cpuidle: sysfs: make kobj_type structures constant

Since commit ee6d3dd4 ("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 definitions to prevent
modification at runtime.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpuidle/sysfs.c

@@ -200,7 +200,7 @@ static void cpuidle_sysfs_release(struct kobject *kobj)
 	complete(&kdev->kobj_unregister);
 }
 
-static struct kobj_type ktype_cpuidle = {
+static const struct kobj_type ktype_cpuidle = {
 	.sysfs_ops = &cpuidle_sysfs_ops,
 	.release = cpuidle_sysfs_release,
 };
@@ -447,7 +447,7 @@ static void cpuidle_state_sysfs_release(struct kobject *kobj)
 	complete(&state_obj->kobj_unregister);
 }
 
-static struct kobj_type ktype_state_cpuidle = {
+static const struct kobj_type ktype_state_cpuidle = {
 	.sysfs_ops = &cpuidle_state_sysfs_ops,
 	.default_groups = cpuidle_state_default_groups,
 	.release = cpuidle_state_sysfs_release,
@@ -594,7 +594,7 @@ static struct attribute *cpuidle_driver_default_attrs[] = {
 };
 ATTRIBUTE_GROUPS(cpuidle_driver_default);
 
-static struct kobj_type ktype_driver_cpuidle = {
+static const struct kobj_type ktype_driver_cpuidle = {
 	.sysfs_ops = &cpuidle_driver_sysfs_ops,
 	.default_groups = cpuidle_driver_default_groups,
 	.release = cpuidle_driver_sysfs_release,