* Add AArch64/ARM64 EFI boot support (for QEMU and some boards)
* Allow GRUB to load cmdline.txt-like
* Enable qcow2/vmdk disk images
Co-authored-by: Stefan Agner <stefan@agner.ch>
* Rename Home Assistant Amber to Yellow
Rename the board from "amber" to "yellow" as Home Assistant Yellow is
the official name now.
* Add Home Assistant Yellow to the build matrix
These boards support the rather ancient ARMv6 architecture only. We
officially stopped supporting them already two releases ago, its time to
say goodbye.
