ath6kl: add tx_comp_multi() to struct htc_ep_callbacks

It's also needed by the USB code.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/htc.h

@@ -326,6 +326,7 @@ struct htc_ep_callbacks {
 					      struct htc_packet *);
 	struct htc_packet *(*rx_allocthresh) (struct htc_target *,
 					      enum htc_endpoint_id, int);
+	void (*tx_comp_multi) (struct htc_target *, struct list_head *);
 	int rx_alloc_thresh;
 	int rx_refill_thresh;
 };

drivers/net/wireless/ath/ath6kl/init.c

@@ -256,6 +256,7 @@ static int ath6kl_init_service_ep(struct ath6kl *ar)
 	memset(&connect, 0, sizeof(connect));
 
 	/* these fields are the same for all service endpoints */
+	connect.ep_cb.tx_comp_multi = ath6kl_tx_complete;
 	connect.ep_cb.rx = ath6kl_rx;
 	connect.ep_cb.rx_refill = ath6kl_rx_refill;
 	connect.ep_cb.tx_full = ath6kl_tx_queue_full;