TSP: reorganize and update touchkey control

Thx to: https://github.com/CyanogenMod/android_kernel_samsung_smdk4210/commit/a2aa51307389d5ac6ba2659117c70e59a0df0ea3

Change-Id: Ib36e8c2fbcf0c17815a3f05fcbb3128b54a23648
Merge "TSP: reorganize and update touchkey control" into cm-10.1