ARM: dts: msm: add PMS405 peripheral devices

Add new device tree files pms405-rpm-regulator.dtsi and
pms405.dtsi which contain devices for PMS405 peripherals.

Change-Id: Iae62b910c3f0574d7f77958268aa2b8e5d8aac61
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>