sweep2wake: add sweep2wake to touchscreen driver

A lot of things don't work, but the events are probably right (dmesg output with
lots of "sweep"-things while i stroke the display...)
The things that don't work are marked with a "TODO" (at least i guess they don't work).
Button-Backlights are not very neccessary, so better don't work on them ;)

There should be a implementation, that those buttons don't "sleep".

Display is off->Buttons on->Sweep2wake->Display is on.

I appreciate any help :D

Source: https://github.com/showp1984/bricked-shooteru-ics-sense/commits/master#