Revert "msm: pm-8x60: Add early return to msm_pm_enable_retention()"

This reverts commit 405350c2a1f7099a54a422a07d4fb6875d841875.

Change-Id: I760ddd847adcd453cd3a75aa2b6480e1e705cc7a
Merge "Revert "msm: pm-8x60: Add early return to msm_pm_enable_retention()"" into jb4.2