HID core registers input, hidraw and hiddev devices, but leaves
unregistering it up to the individual driver, which is not really nice.
Let's move all the logic to the core.
Reported-by: NMarcel Holtmann <marcel@holtmann.org>
Reported-by: NBrian Rogers <brian@xyzw.org>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>