Merge tag 'u-boot-imx-master-20250522' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/26275

- Fix boot regression on imx8mn_bsh_smm_s2/s2pro.
- Fix reset on imx6ulz_smm_m2.
- Adjust DDR initialization on imx6ulz_smm_m2.
- Fix CAAM startup error.