Merge tag 'ti-v2021.04-rc2' of https://gitlab.denx.de/u-boot/custodians/u-boot-ti

- Sync DTS from Linux kernel for all K3 platforms
- Add MMC higher speed nodes for AM65x, J721e, J7200
- Convert Nokia RX-51 to use CONFIG_DM_MMC
- Minor fixes for LEGO MINDSTORMS