Integrate meta-seco-imx/u-boot-seco-imx/seco_lf_v2021.04-gm_mx8qm_boot

Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-imx/-/commit/2d2bd91511fab31127a6955dc63239441f63b047

Integrate u-boot-seco-imx/seco_lf_v2021.04-gm_mx8qm_boot

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/b9a45a73e4515d2ae29a014c3c5aae4b8117a048

[i.MX8] fix print of IMX-MKIMAGE commit hash on enabled CONFIG_OF_EMBED

The commit hash for imx-mkimage is located after the end of the u-boot binary. In case of CONFIG_OF_EMBED, since the fdt is embedded, the calculation for the hash address is different.

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/d3dd539307f5646f32c986d4e025e72b4cc3f493

[i.MX8QM][C26][C43] fix DM loading error

On specific builds of u-boot, the DM may fail to load on boot at u-boot level: the fdt seems to be recognized, but only the DM root driver starts. This seems to be caused by the byte alignment inside the binary, as adding/removing variables in the code or characters from the u-boot version string changes the boot result on subsequent builds. As workaround, we embed the fdt into the u-boot ELF image as rodata.