Revert "video: msm: Initialize screeninfo in pan_display"

This reverts commit 107521fb239d37516cd38dc2c90b3304a3cb8cc6.
Revert "msm: display: non-blocking for overlay update"

This reverts commit 1d008caa56c7453899b30124e48ec20723176d1e.
Revert "msm_fb: display: consolidate overlay_commit and display_commit"

This reverts commit 8f955dfb7522f0f73c54ed833517e0a945228ce0.

Change-Id: If67b0713273a7f6d1410faa7cc5dd8c885fbddb3
video: msm: Check for null in LCDC IRQ handler

Change-Id: I47edb06b281f43ea898e06b6951a305a16852b94