iwlwifi: mvm: add missing implementation of flush for a000 devices

In the mac flush flow, we should flush all existing queues.
Since FW API for a000 devices is flush per RA-TID, simply
flush all stations with all tids.
From FW perspective, asking to flush a TID that doesn't have
a queue is valid, so we can just set all bits in the TID mask.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -4004,18 +4004,11 @@ static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
 {
 	int i;
 
-	if (drop) {
-		if (iwl_mvm_has_new_tx_api(mvm))
-			/* TODO new tx api */
-			WARN_ONCE(1,
-				  "Need to implement flush TX queue\n");
-		else
+	if (!iwl_mvm_has_new_tx_api(mvm)) {
+		if (drop)
 			iwl_mvm_flush_tx_path(mvm,
 				iwl_mvm_flushable_queues(mvm) & queues, 0);
-		return;
-	}
-
-	if (!iwl_mvm_has_new_tx_api(mvm)) {
+		else
 			iwl_trans_wait_tx_queues_empty(mvm->trans, queues);
 		return;
 	}
@@ -4029,6 +4022,9 @@ static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
 		if (IS_ERR_OR_NULL(sta))
 			continue;
 
+		if (drop)
+			iwl_mvm_flush_sta_tids(mvm, i, 0xFF, 0);
+		else
 			iwl_mvm_wait_sta_queues_empty(mvm,
 					iwl_mvm_sta_from_mac80211(sta));
 	}