wifi: iwlwifi: mld: initialize regulatory early

Since iwlmld claims wiphys to be self-managed, it needs to
have a regdomain registered before the wiphy is registered
to avoid issues when trying to get the regdomain, e.g. via
"iw phy phy0 reg get".

Move the initialization early, on every FW start not just
when starting to really operate it. This also requires the
self-managed flag to be set early.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250309073442.10ab8fed94e9.I7c8dee3d14c7427a56882739f82546c6492f3b10@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>