MSM DRM register logging

configname: CONFIG_DRM_MSM_REGISTER_LOGGING

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>MSM DRM register logging
In linux kernel since version 3.12 (release Date: 2013-11-03)  
Compile in support for logging register reads/writes in a format
that can be parsed by envytools demsm tool. If enabled, register
logging can be switched on via msm.reglog=y module param.