input: add snapshot of qpnp-power-on driver

The qpnp-power-on driver provides support for key presses via
several key specific PMIC inputs.  It also supports reading
power-on reasons and configuring the power-off type (i.e.
restart, shutdown, etc).

This snapshot is taken as of msm-4.4
commit 07f2f9952c78 ("input: move qpnp-power-on driver into
input/misc directory").

Change-Id: Idcbaefa635d49075c9b93819766d722ca0eb698f
Signed-off-by: David Collins <collinsd@codeaurora.org>