wifi: iwlwifi: mvm: Activate EMLSR based on traffic volume

Adjust EMLSR activation to account for traffic levels. By
tracking the number of RX/TX MPDUs, EMLSR will be activated only when
traffic volume meets the required threshold.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240505091420.9480f99ac8fc.If9eb946e929a39e10fe5f4638bc8bc3f8976edf1@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>