The cgroup_enable parameter is a Raspberry Pi kernel specific kernel
parameter. Upstream based kernel do not have the parameter, and hence
do not do anything.
This gets rid of the following message during boot:
Unknown kernel command line parameters "cgroup_enable=memory", will be passed to user space.
* Retry up to 3 times
By default, HAOS used to retry 3 times. That is still true for U-Boot
based boards. Apply the same logic for GRUB2 based systems for
consistency.
This can help to remedy intermittent internet/connectivity issuese.
Altough hacky, in practise it makes sense to give the newly installed OS
another go.
* Also apply to generic-aarch64
This aligns with what we used to have in Barebox. Most of the time the
user is not expected to make a choice, so keeping the timeout short is
sensible.
* 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>
