R-Car DU LVDS Encoder Support

configname: CONFIG_DRM_RCAR_USE_LVDS

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Device Tree and Open Firmware support
└─>R-Car DU LVDS Encoder Support
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Enable support for the R-Car Display Unit embedded LVDS encoders.