Integrate meta-seconorth-machine/kirkstone-sort-devicetree

Commit: seco-ne/yocto/layers/meta-seconorth-machine@875e147f

imx8mguf: Resort the devicetree list as the first entry is used as default

The overlays should be at the end, and the normal devicetrees from the second on should be sorted alphabetically, but the first entry should be kept as default used during installation when no dtb is given as parameter.