input: touchscreen: Add new Focaltech touch driver

This is the reference driver source code for Focaltech Touch Sensor.

Change-Id: I86e60f6774812d7a4e553530197d56b0276f2dab
Signed-off-by: chenx <chenxiang0527@thundersoft.com>
Git-commit: 54e1e61066d03e2a9dc46d928b2744713842b070
Git-repo: https://source.codeaurora.org/external/thundersoft/ihvjointlab/sensor-driver/commit/?h=Focaltech_touch


Signed-off-by: Srikanth Katteboina <quic_skattebo@quicinc.com>