input: cyttsp-i2c: Enable firmware loading feature from driver

TTSP firmware can be loaded during driver's probe by updating
the firmware header file. This header file contains the firmware
data as part of an array and it's version number.

Change-Id: Ia80aab77d654d64ab3bb14c9b316bb851b90f241
Signed-off-by: Kevin McNeely <kev@cypress.com>
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>