From: Čestmír Kalina on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/3067#note_1869...
I had originally planned to add it to mod-extra as in c9s, but after rebasing
the MR I saw that the existing rule puts it into modules-internal, which
seemed appropriate for ARK.
Changed def_variants.yaml.rhel to include it in module-extra to keep it in
line with c9s.