Revert "msm: Fix high load average from uninterruptible waits"

This reverts commit 37c4aeefcaf6301b58713e358a50f4c1784373ee.
Revert "msm: mdss: Add update notify for backlight change in static screen"

This reverts commit c1a508d8beaa8ffb78d389f9f9ff25a5e708ef57.