ARM: dts: msm: Add pacman for msm8996

The Peripheral Access Control Manager (PACMan) is responsible
for managing and switching ownership of a peripheral from one
subsystem to another. This patch adds device tree information
for pacman driver for msm8996.

Change-Id: Iddc473dbd4be0c3466ae02e6232f9c1b1e2b4a88
Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>