Integrate meta-seconorth-mtk/fix-mv-pins

Commit: seco-ne/yocto/layers/meta-seconorth-mtk@d2f82cf5

kernel:dtbo:mv: Fix RS485 RTS pin number

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Commit: seco-ne/yocto/layers/meta-seconorth-mtk@4785b59f

kernel:dtbo:displays: Change reset-gpio to SMARC GPIO2 for MV displays

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Commit: seco-ne/yocto/layers/meta-seconorth-mtk@d5f9d256

kernel:dtbo: Mobe the list of overlays to machine config

This way the variable can also be used for release packaging in CI