Bluetooth: btmtksdio: drop the unnecessary variable created

Use the existent variable to drop the unnecessary variable created.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btmtksdio.c

@@ -98,6 +98,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
 #define MTK_SDIO_BLOCK_SIZE	256
 
 #define BTMTKSDIO_TX_WAIT_VND_EVT	1
+#define BTMTKSDIO_HW_TX_READY		2
 
 struct mtkbtsdio_hdr {
 	__le16	len;
@@ -113,7 +114,6 @@ struct btmtksdio_dev {
 	struct work_struct txrx_work;
 	unsigned long tx_state;
 	struct sk_buff_head txq;
-	bool hw_tx_ready;
 
 	struct sk_buff *evt_skb;
 
@@ -254,7 +254,7 @@ static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
 	sdio_hdr->reserved = cpu_to_le16(0);
 	sdio_hdr->bt_type = hci_skb_pkt_type(skb);
 
-	bdev->hw_tx_ready = false;
+	clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
 	err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
 			   round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
 	if (err < 0)
@@ -484,11 +484,12 @@ static void btmtksdio_txrx_work(struct work_struct *work)
 			bt_dev_dbg(bdev->hdev, "Get fw own back");
 
 		if (int_status & TX_EMPTY)
-			bdev->hw_tx_ready = true;
+			set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
+
 		else if (unlikely(int_status & TX_FIFO_OVERFLOW))
 			bt_dev_warn(bdev->hdev, "Tx fifo overflow");
 
-		if (bdev->hw_tx_ready) {
+		if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) {
 			skb = skb_dequeue(&bdev->txq);
 			if (skb) {
 				err = btmtksdio_tx_packet(bdev, skb);
@@ -832,7 +833,7 @@ static int btmtksdio_setup(struct hci_dev *hdev)
 	u32 fw_version = 0;
 
 	calltime = ktime_get();
-	bdev->hw_tx_ready = true;
+	set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
 
 	switch (bdev->data->chipid) {
 	case 0x7921: