ARM: dts: add device tree file for pm8004

This file serves as the placeholder for all SPMI
peripherals located on PM8004.

Add device nodes for the following peripherals:

  * MPP 1-4
  * REVID
  * TEMP_ALARM

Change-Id: I2b5229799a024f313d72499d8caaee2a730a5d8b
Signed-off-by: David Keitel <dkeitel@codeaurora.org>