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.

This patch is propagated from msm-3.18 kernel.
'commit 5cc0bff80d65 ("input: ft5x06_ts: add gesture feature support")'
Also cleared the following checkpatch warnings.
- Missing a blank line after declarations
- Missing a blank line after declarations
- Comparisons should place the constant on the right side of the test.

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