Cypress Touchkey: revert back cypress-touchkey.c to keep support for European Key Layout

Support for European keylayout (2 Soft, 1 Hardkey)
On Samsung QCOM Devices has been removed from the CyanogenMod
MSM8660-common Kernel tree since jellybean branch

To keep support for that Layout cypress-touchkey.c is reverted
to a "known to work" state.

This still needs some rework later but works for now