We don't need a kset here, a simple kobject will do just fine, so
dynamically create the kobject and use it.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: NChris Wright <chrisw@sous-sol.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>