mt76: mt7915: schedule tx tasklet in mt7915_mac_tx_free

The previous scheduling round may have been limited by AQL.
More frames might be available after the tx free run.
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/dma.c

@@ -96,8 +96,6 @@ static int mt7915_poll_tx(struct napi_struct *napi, int budget)
 
 	mt7915_tx_cleanup(dev);
 
-	tasklet_schedule(&dev->mt76.tx_tasklet);
-
 	if (napi_complete_done(napi, 0))
 		mt7915_irq_enable(dev, MT_INT_TX_DONE_ALL);
 

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -936,6 +936,7 @@ void mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb)
 	dev_kfree_skb(skb);
 
 	mt7915_mac_sta_poll(dev);
+	tasklet_schedule(&dev->mt76.tx_tasklet);
 }
 
 void mt7915_tx_complete_skb(struct mt76_dev *mdev, enum mt76_txq_id qid,