[faiproject/fai] a52800: ignore device containing the FAI CD, print earning...

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: a52800ad54de58ec4c389546c4c3255dea791153
      https://github.com/faiproject/fai/commit/a52800ad54de58ec4c389546c4c3255dea791153
  Author: Thomas Lange <lange at debian.org>
  Date:   2023-12-02 (Sat, 02 Dec 2023)

  Changed paths:
    M conf/grub.cfg

  Log Message:
  -----------
  ignore device containing the FAI CD, print earning if no grub.cfg was found