Revert "board/MynaPlayer odyssey: use reworked pre-init from Jookia." ...

This reverts commit ba2192b.

board/MynaPlayer odyssey: use reworked pre-init from Jookia. ...

This pre-init removes one unneeded setp, and avoids the messy long line at the end of the script.

board/MynaPlayer odyssey: fix rauc-mark-good.service. ...

Readded the [Install] section, and added 'ConditionKernelCommandLine=|bootchooser.active' to make this service trigger only if barebox's bootchooser framework passed the correct argument into the kernel command line.

board/MynaPlayer odyssey: hopefully fix networking. ...

Long story short, makedev syntax does not seem to cope well with spaces at all, so our only way is to change the profile name and the file name of the nmconnection file.

board/MynaPlayer odyssey: make rauc a bit more functionnal. ...

This replaces the previous service that marked the system as good when booting up with one that has the following:

- Starts after sshd, login prompt on serial console, and NetworkManager have all started up.
- Requires those three services to be up, not simply wanting them.
- If any of them fail to start, the rauc-mark-good.service fails with the result dependency and the rauc-failure.service included by this commit is triggered, and immediately reboots the system.
- The [Install] section is no longer required due to the service being pulled along by its own dependencies.

board/MynaPlayer odyssey: added basic service to mark boot as good with rauc.

board/MynaPlayer odyssey: add pre-init script to setup overlay filesystem. ...

This adds a pre-init script that is ran before systemd. This scripts prepares the system so that the rootfs will be left unaltered, but combine it with a writable ext4 filesystem, where data can be stored into. Both rootfs use the same overlay, which makes it possible to preserve data while overriding the rootfs during an upgrade.

board/MynaPlayer odyssey: fix IPv6 for the wired connection. ...

The default setting for generating addresses in IPv6 with NetworkManager is stable-privacy. That makes for unpredictable IPv6 addresses accross slots, and is hence entirely inacceptable. This commit changes this to be standard SLAAC without privacy instead. This also adds a device table to set the correct file permissions for the provided nmconnection file (0600 is required).

board/MynaPlayer odyssey: Allow root to login via ssh (prohibit-password). Disabled clear text password authentification.

board/MynaPlayer odyssey: modify boot spec entry. ...

The bootloader specs file doesn't set earlycon anymore (this was unsupported), and rootwait is now set to have the kernel wait for the root device (required when booting without an initramfs).

boot: Add systemd.log_color=off to aid serial logging ...

Colors just spew escape codes all over the log file, so remove them.

Initial commit.