Kobject: convert drivers/* from kobject_unregister() to kobject_put()

There is no need for kobject_unregister() anymore, thanks to Kay's
kobject cleanup changes, so replace all instances of it with
kobject_put().


Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index d1ee383..e9de171 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -130,7 +130,7 @@
 static void pkt_kobj_remove(struct pktcdvd_kobj *p)
 {
 	if (p)
-		kobject_unregister(&p->kobj);
+		kobject_put(&p->kobj);
 }
 /*
  * default release function for pktcdvd kernel objects.