wifi: iwlwifi: mvm: update mac id management

The restriction where MAC ID 0 could be used only for the
managed/IBSS vif is not required when using the new MLO FW API.
Update the driver.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230417113648.e4355615da92.Iba934ccf8589c3c27a25a390dc5e938312889b45@changeid


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