wifi: iwlwifi: add definitions for iwl_mac_power_cmd version 2

This version has a new flag bit that indicates whether or not SMPS is
allowed for the MAC.
This only adds the API, the actual support will be done in other
patches.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Link: https://patch.msgid.link/20250424153620.991ff01b8d16.Id0aa4061d7926753b03a13bf94ec1ac9e1d18745@changeid


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