If the option is not manually specified, and the hwids directory exists for the target EFI architecture, default to it. Allow passing '' to skip. Fixes https://github.com/systemd/systemd/issues/40542
If the option is not manually specified, and the hwids directory exists for the target EFI architecture, default to it. Allow passing '' to skip. Fixes https://github.com/systemd/systemd/issues/40542