[faiproject/fai] 7a1862: use iproute commands instead of brctl

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: 7a1862a0ae97bab9a17b604046568bffad46874e
      https://github.com/faiproject/fai/commit/7a1862a0ae97bab9a17b604046568bffad46874e
  Author: Thomas Lange <lange at debian.org>
  Date:   2022-05-26 (Thu, 26 May 2022)

  Changed paths:
    M dev-utils/fai-mk-network

  Log Message:
  -----------
  use iproute commands instead of brctl


  Commit: 2afcff6cc64b78b7769372ab5b50f417545ceb7e
      https://github.com/faiproject/fai/commit/2afcff6cc64b78b7769372ab5b50f417545ceb7e
  Author: Thomas Lange <lange at debian.org>
  Date:   2022-05-26 (Thu, 26 May 2022)

  Changed paths:
    M dev-utils/fai-mk-network

  Log Message:
  -----------
  no need to set the mac address of the tap devices since bullseye

See #981076 for more infos


Compare: https://github.com/faiproject/fai/compare/4b0f06c33549...2afcff6cc64b