iwlwifi: mvm: document monitor mode reorder buffer bypass

The reorder buffer is bypassed because the firmware won't have
any BA sessions, document this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c

@@ -658,6 +658,8 @@ static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
 	 * This also covers the case of receiving a Block Ack Request
 	 * outside a BA session; we'll pass it to mac80211 and that
 	 * then sends a delBA action frame.
+	 * This also covers pure monitor mode, in which case we won't
+	 * have any BA sessions.
 	 */
 	if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
 		return false;