Bluetooth: btusb: Fixed too many in-token issue for Mediatek Chip.

This patch reduce in-token during download patch procedure.
Don't submit urb for polling event before sending hci command.
Signed-off-by: Nmark-yw.chen <mark-yw.chen@mediatek.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btusb.c

@@ -3312,11 +3312,6 @@ static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
 	struct btmtk_wmt_hdr *hdr;
 	int err;
 
-	/* Submit control IN URB on demand to process the WMT event */
-	err = btusb_mtk_submit_wmt_recv_urb(hdev);
-	if (err < 0)
-		return err;
-
 	/* Send the WMT command and wait until the WMT event returns */
 	hlen = sizeof(*hdr) + wmt_params->dlen;
 	if (hlen > 255)
@@ -3342,6 +3337,11 @@ static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
 		goto err_free_wc;
 	}
 
+	/* Submit control IN URB on demand to process the WMT event */
+	err = btusb_mtk_submit_wmt_recv_urb(hdev);
+	if (err < 0)
+		return err;
+
 	/* The vendor specific WMT commands are all answered by a vendor
 	 * specific event and will have the Command Status or Command
 	 * Complete as with usual HCI command flow control.