R-Car DU LVDS Encoder Support

configname: CONFIG_DRM_RCAR_USE_LVDS

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>Device Tree and Open Firmware support
└─>R-Car DU LVDS Encoder Support
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Enable support for the R-Car Display Unit embedded LVDS encoders.