J721E Cadence DPI/DP wrapper support

configname: CONFIG_DRM_CDNS_MHDP8546_J721E

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>Display Interface Bridges
└─>J721E Cadence DPI/DP wrapper support
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Support J721E Cadence DPI/DP wrapper. This is a wrapper
which adds support for J721E related platform ops. It
initializes the J721E Display Port and sets up the
clock and data muxes.