synaptics_3k: cleanup and get rid of LEGACY_TOUCHSCREEN function

* LEGACY_TOUCHSCREEN was sheer laziness - it required one BTN_TOUCH event to be added
* cleanups make file prettier :)

Change-Id: I5a87294ab86b21d5c8adcc32c6bda6fecbe20734
msm7x27 zte kernel: update touchscreen drivers for Skate

* The other two drivers that are used on the skate are even more of a mess than the synapics one
* Clean them up and try to create a similar BTN_TOUCH event as for the synaptics TS

Change-Id: I6e320a725b43d1d240ded620836764d362bc1abd