wifi: iwlwifi: mvm: Propagate ERP slot changes to FW

In AP mode, ERP slot changes weren't properly indicated to the FW.
Fix it.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230612184434.ef242b8ce245.I01eddee9d3a9a3208499c223eb8e70fe6663f42c@changeid


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