Integrate u-boot-seco-imx/oleksii/extend-seco_fdt_overlay
Commit: clea-os/bsp/nxp/u-boot-seco-imx@d53aab58
[CMD][FDT_OVERLAY] Add function to append custom overlays to the list
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Commit: clea-os/bsp/nxp/u-boot-seco-imx@87740753
[CMD][FDT_OVERLAY] Add header for custom FDT overlay function
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Commit: clea-os/bsp/nxp/u-boot-seco-imx@f34d6455
[CMD][FDT_OVERLAY] Add support for custom overlays
This will introduce the generic way to apply misc overlays like for specific board revision