Merge tag 'video-for-v2021.04-rc3' of https://gitlab.denx.de/u-boot/custodians/u-boot-video

 - splash_source warning fix when building with 64-bit toolchains
 - lq123p1jx31 and nv101wxmn51 compatible in simple panel driver
 - remove not used mb862xx driver
 - add Himax HX8238D panel driver
 - s/video_uc_platdata/video_uc_plat/