Revert "Revert "sched: scale cpu load for judgment of group imbalance""

This reverts commit 519e6ce8bfbfce8a401f27a9c01243976f52db79.
Revert "Revert "msm_fb: display: Add new panel_mutex""

This reverts commit d3bc37bcf41c053d38527ab6a66f6a0a77d69ab2.