Integrate meta-seconorth-machine/u-boot-changes

Commit: seco-ne/yocto-imx93/layers/meta-seconorth-machine@c4736e4b

bsp:u-boot: Use maury defconfig

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Commit: seco-ne/yocto-imx93/layers/meta-seconorth-machine@9b673f4c

bsp:u-boot: Fix Build directory path

Was causing build errors when building checked out and modified sources

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Commit: seco-ne/yocto-imx93/layers/meta-seconorth-machine@abbc62c8

bsp:imx-atf: Remove imx-atf patch

First need to verify it's possible (there was info it was not working in kernel 6.1)