Integrate meta-seconorth-machine/mx8_cleanup

Commit: seco-ne/yocto/layers/meta-seconorth-machine@df176aae

machine:tanaro: Added RTC overlays

In the future, the TANARO will be produced with two possible RTC variants. Both variants are present in the main devicetree but are disabled by default. During the installation, one of the RTCs will be activated via one of the two devicetree overlays.

BCS 746-000877

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Commit: seco-ne/yocto/layers/meta-seconorth-machine@49cec441

machine: Clean-up of i.MX8MM machine

Also small changes to the Kernel include file.

Source merge request: seco-ne/yocto/layers/meta-seconorth-machine!239 (merged)

mentioned in merge request seco-ne/yocto/layers/meta-seconorth-machine!239 (merged)

merged