Integrate meta-seconorth-machine/u-boot

Commit: seco-ne/yocto-mediatek/layers/meta-seconorth-machine@c2104b4a

recipes-kernel: Add bbappend file with more patches

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Commit: seco-ne/yocto-mediatek/layers/meta-seconorth-machine@8ad57705

recipes-bsp:u-boot: Add bbappdend and patches

from meta-rity/meta/recipes-bsp/u-boot

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Commit: seco-ne/yocto-mediatek/layers/meta-seconorth-machine@c3af6fa8

recipes-bsp:u-boot: Fix u-boot-env error

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Commit: seco-ne/yocto-mediatek/layers/meta-seconorth-machine@15028804

recipes-bsp: Add u-boot Recipe

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Commit: seco-ne/yocto-mediatek/layers/meta-seconorth-machine@ed9469cc

conf:machine: Rename kernel recipes

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Commit: seco-ne/yocto-mediatek/layers/meta-seconorth-machine@6902027d

conf:machine: Add seco-genio-700 to machine overrides