cpuidle: sysfs: make kobj_type structures constant

Since commit ee6d3dd4ed48 ("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 <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/cpuidle/sysfs.c

···
 	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,
 };
···
 	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,
···
 };
 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,