ARM: dts: msm8226: Add skuf pvt device tree

QRD SKUF PVT device will use different pmic version
which has different hardware design that has to
be distinguished with original DVT and EVT.

Change-Id: I5411706650414ee628839d854c6a897fe77146b8
Signed-off-by: Maria Yu <aiquny@codeaurora.org>