Merge tag 'u-boot-imx-master-20240212' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

CI:
https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/19583

- Fix the i.MX8MP SPI compatible string.
- Let the SPL clock code do the configuration on Data Modul i.MX8M Plus
  eDM SBC.
- Enable secure boot on the imx93_var_som board.