This fixes a use of flush_scheduled_work() in USB HID's reset logic that can
deadlock.
Tested-by: NValdis Kletniks <Valdis.Kletnieks@vt.edu>
Signed-off-by: NOliver Neukum <oliver@neukum.name>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>