mt76: do not wake tx queues during flush

While the queue is being cleaned up, the stack must not attempt to add
any extra packets

Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/dma.c

@@ -168,7 +168,7 @@ mt76_dma_tx_cleanup(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush)
 
 		if (entry.txwi) {
 			mt76_put_txwi(dev, entry.txwi);
-			wake = true;
+			wake = !flush;
 		}
 
 		if (!flush && q->tail == last)