Merge tag 'u-boot-imx-master-20240802' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/21846

- Convert warp7 to OF_UPSTREAM.
- Add 'cpu' command to imx8m and imx93.
- Enable CMD_ERASEENV for imx8mm/mp Phytec boards.