Enable DPU support in MSM DRM driver

configname: CONFIG_DRM_MSM_DPU

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Enable DPU support in MSM DRM driver
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Compile in support for the Display Processing Unit in
the MSM DRM driver. It is the display controller found in devices
using e.g. SDM845 and newer platforms.