Merge tag 'u-boot-imx-next-20240524' of https://gitlab.denx.de/u-boot/custodians...

CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/20834

- Allow signing i.MX8M flash.bin via binman, which is a much more
  elegant solution that using scripts.
- Improve i.MX8M HAB documentation.
- Increase PHY auto-negotiation timeout to 20s on MX8Menlo
- Add bmode support for the MX53 Menlo board.
- Update Update iMX8MM Menlo board configuration