wifi: iwlwifi: mvm: s/iwl_bt_coex_profile_notif/iwl_bt_coex_prof_old_notif

wifi: iwlwifi: mvm: s/iwl_bt_coex_profile_notif/iwl_bt_coex_prof_old_notif

The iwl_bt_coex_profile_notif is now being obsoleted. It'll be replaced
by a new notification coming with a non-legacy group. Rename it to avoid
confusion.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240729201718.dc29fd0d7817.I5881fce86ec8b76ae98d2948265434b8e7d860c1@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>