USB: pd: Fix compilation issues for 32 bit support

Compilation errors are seen from qpnp-pdphy.c and policy_engine.c
drivers, when try to compile for 32 bit support. Hence fix those
errors for 32 bit support getting compiled successfully.

Change-Id: I0c496a73feb83c640f9a135f98ec393d1096b205
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>