mt76: add skb pointer to mt76_tx_info

Pass skb pointer to tx_prepare_skb through mt76_tx_info data structure.
This is a preliminary patch to properly support dma error path for
new chipsets (e.g. 7615)

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -85,6 +85,7 @@ struct mt76_queue_buf {
 
 struct mt76_tx_info {
 	struct mt76_queue_buf buf[32];
+	struct sk_buff *skb;
 	int nbuf;
 	u32 info;
 };
@@ -291,8 +292,7 @@ struct mt76_driver_ops {
 	void (*update_survey)(struct mt76_dev *dev);
 
 	int (*tx_prepare_skb)(struct mt76_dev *dev, void *txwi_ptr,
-			      struct sk_buff *skb, enum mt76_txq_id qid,
-			      struct mt76_wcid *wcid,
+			      enum mt76_txq_id qid, struct mt76_wcid *wcid,
 			      struct ieee80211_sta *sta,
 			      struct mt76_tx_info *tx_info);