dt2w: add doubletap2wake (disabled by default)
* Squashed, based from showp1984 and flar2 work
* Modes: 0:disabled, 1:enabled, 2:enabled fullscreen

Signed-off-by: engstk <eng.stk@sapo.pt>

Conflicts:
	drivers/video/msm/mdss/mdss_dsi_panel.c
dt2w: Prevent touches during phone calls
based on flar2 work

Signed-off-by: engstk <eng.stk@sapo.pt>
dt2w: Option to disable with power button

Signed-off-by: engstk <eng.stk@sapo.pt>