Merge tag 'video-20230407' of https://source.denx.de/u-boot/custodians/u-boot-video

 - fix building sandbox without SDL
 - improve tegra DC driver to work with panel ops and implement
   native 180 degree panel rotation support
 - add T30 support to tegra DC driver
 - add DSI driver (based on mainline Linux one with minor
   adjustments, only T30 tested)
 - add get_display_timing ops to simple panel driver
 - extend simple panel driver to use it for MIPI DSI panels
   which do not require additional DSI commands for setup