platform: msm_shared: set mdp video stop mode
platform: msm_shared: set mdp video stop mode

When dynamic refresh is triggered and DSI sets the video stop signal,
mdp line counter is halted, but not mdp engine is stopped by setting
this bit.

Change-Id: I4dda1dfe404c4c067b5c88b598dd1deb955a381c

efidroid/lk,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,efidroid/lk,efidroid/lk,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,efidroid/lk,CanarySolutions/little-kernel,efidroid/lk,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk