Revert "msm_fb: display: extend mutex protection for mdp pan display"

This reverts commit 31aa5d43a0b38a7cab19c944a873ba58b54aff97.
Revert "Revert "Re-Implemented GPU Governor With Code Fix""

This reverts commit 50e1d67abe8ace8af51aa12ea1d2080988b3f4f9.