msm: pm: Turn msm_init_pm back into a late initcall

Change-Id: I31ae9444e6d5b13a447cd2356c8fa3db717c228c
Revert "Revert "msm: pm: Fix broken reg_val check""

This reverts commit 605f31469cc4de15f3cdea3ee339151f3ef51e33.