kobject: make dynamic_kobj_ktype and kset_ktype const

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>
Link: https://lore.kernel.org/r/20230204-kobj_type-kobj-v1-1-ddd1b4ef8ab5@weissschuh.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

lib/kobject.c

@@ -737,7 +737,7 @@ static void dynamic_kobj_release(struct kobject *kobj)
 	kfree(kobj);
 }
 
-static struct kobj_type dynamic_kobj_ktype = {
+static const struct kobj_type dynamic_kobj_ktype = {
 	.release	= dynamic_kobj_release,
 	.sysfs_ops	= &kobj_sysfs_ops,
 };
@@ -921,7 +921,7 @@ static void kset_get_ownership(const struct kobject *kobj, kuid_t *uid, kgid_t *
 		kobject_get_ownership(kobj->parent, uid, gid);
 }
 
-static struct kobj_type kset_ktype = {
+static const struct kobj_type kset_ktype = {
 	.sysfs_ops	= &kobj_sysfs_ops,
 	.release	= kset_release,
 	.get_ownership	= kset_get_ownership,