defconfig: msm: Enable pacman driver

The Peripheral Access Control Manager (PACMan) is responsible
for managing and switching ownership of a peripheral from one
subsystem to another.

Change-Id: I77e8bb7a9bdf7bda5a63ddd45dc989db5ad0b311
Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>