Input: ucb1400_ts - use schedule_timeout_uninterruptible

Given that the code is not checking for signals it should
use uninterruptible sleep.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>