{rx,tx}done_work's are only initialized for usb devices.
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Cc: stable@kernel.org
Acked-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>