msm: pm: fix power driver compilation issues

Fix power driver compilation issues. Modify basic data types
usage(i.e long & pointer sizes) such that make power drivers
more generic to compile for different build environments.

CRs-fixed: 579034
Change-Id: I49dfb08037da9f1bb00814f5c3961db0434887ea
Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org>