input: touchscreen: synaptics_tcm: enable touch driver

Enable touch driver in touch driver.
Support drm_panel callback to be notified when screen on/off.
Add new property "synaptics,firmware-name" when different modules
with same touch IC.

Change-Id: I58159ce531913108e702227c5474fdc2f539d2d3
Signed-off-by: Fei Mao <feim1@codeaurora.org>
Signed-off-by: Ritesh Kumar <riteshk@codeaurora.org>