Input: ucb1400 - make delays configurable

This patch adds module parameters for several timing values used
in the driver. These values can vary based on the hardware design
and how much capacitive filtering there is on the touch panel inputs,
and the resistance of the panel.

Signed-off-by: Cliff Brake <cbrake@bec-systems.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>