input: ft5x06_ts: add gesture feature support

Focaltech touch controller FT6436 support new feature Screen-off-Gesture.
It is able to turn on the screen by drawing gestures on the touch screen
when the screen is during off status. Enable the FT CTP driver to support
the screen off gesture recognization.

Change-Id: I77d111d3ef800b636a337221d7e605f746a113dd
Signed-off-by: Mao Li <maol@codeaurora.org>