initial s2w dt2w code import from @showp1984

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>
msm8226: Enable dt2w and s2w

Change-Id: Ic4a50331fd1009be9df1605bb17d6daa110c86e0