Bluetooth: btqca: Enable MSFT extension for Qualcomm WCN399x

The following Qualcomm WCN399x Bluetooth controllers support the
Microsoft vendor extension and they are using 0xFD70 for VsMsftOpCode.
-WCN3990
-WCN3991
-WCN3998

< HCI Command: ogf 0x3f, ocf 0x0170, plen 1
  00
> HCI Event: 0x0e plen 18
  01 70 FD 00 00 1F 00 00 00 00 00 00 00 04 4D 53 46 54

The following test step was performed.
- Boot the device with WCN3991 and verify INFO print in dmesg.
Signed-off-by: Miao-chen Chou <mcchou@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Archie Pusaka <apusaka@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btqca.c

@@ -564,6 +564,19 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 			return err;
 	}
 
+	/* WCN399x supports the Microsoft vendor extension with 0xFD70 as the
+	 * VsMsftOpCode.
+	 */
+	switch (soc_type) {
+	case QCA_WCN3990:
+	case QCA_WCN3991:
+	case QCA_WCN3998:
+		hci_set_msft_opcode(hdev, 0xFD70);
+		break;
+	default:
+		break;
+	}
+
 	/* Perform HCI reset */
 	err = qca_send_reset(hdev);
 	if (err < 0) {