driver: input: touchscreen: add double tap to wake functionnality, reworked...

driver: input: touchscreen: add double tap to wake functionnality, reworked last input time and exposed a sysfs entry for enabling dt2w

Original commit: https://github.com/Khaon/android_kernel_samsung_a3xelte/commit/d8d3bc473e974d4d85ac3db74c14578bd70950d1