Integrate u-boot-seco-imx/seco_lf_v2021.04-gm_mx8qm_docs
Commit: edgehog/bsp/nxp/u-boot-seco-imx@4b83d0ea
[C26] remove NXP README
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Commit: edgehog/bsp/nxp/u-boot-seco-imx@5dc16197
[C26] fix Kconfig target description
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Commit: edgehog/bsp/nxp/u-boot-seco-imx@6216043d
[C43] update MAINTAINERS
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Commit: edgehog/bsp/nxp/u-boot-seco-imx@9c106503
[C43] fix Kconfig target description