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/base/sys.c b/drivers/base/sys.c
index 47fc6eb..e666441 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -264,7 +264,7 @@
 	}
 	mutex_unlock(&sysdev_drivers_lock);
 
-	kobject_unregister(&sysdev->kobj);
+	kobject_put(&sysdev->kobj);
 }