Integrate meta-seco-imx/u-boot-seco-imx/seco_lf_v2021.04_develop_c72_hotfix

Commit: edgehog/layers/seco/meta-seco-imx@ea71668d

Integrate u-boot-seco-imx/seco_lf_v2021.04_develop_c72_hotfix

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@a9b9fc13

[C72n][DEFCONFIG] fix compilation issue

commit 0e6729a66e7e727f2513ee84f1258ae6f2d81fc5 breaks u-boot compilation because SPL do not use driver model; revert defconfig patch to fix it. Boot from eMMC is still supported