initial s2w dt2w code import from @showp1984

Signed-off-by: Paul Reioux <reioux@gmail.com>
mdss:mdss_dsi_panel.c: add s2wake/dt2wake screen on/off hooks

Signed-off-by: Paul Reioux <reioux@gmail.com>
sweep2wake/doubletap2wake: adapt for falcon_umts (aka Moto G)

Signed-off-by: Paul Reioux <reioux@gmail.com>
Enable s2w and dt2w