Bluetooth: btintel: Create common function for firmware download

The firmware download flow for RAM SKU is same for both USB and UART
and this patch creates a common function for both driver.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
index 0391e7a..41c642c 100644
--- a/drivers/bluetooth/btintel.h
+++ b/drivers/bluetooth/btintel.h
@@ -100,7 +100,8 @@ struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read,
 int btintel_send_intel_reset(struct hci_dev *hdev, u32 boot_param);
 int btintel_read_boot_params(struct hci_dev *hdev,
 			     struct intel_boot_params *params);
-
+int btintel_download_firmware(struct hci_dev *dev, const struct firmware *fw,
+			      u32 *boot_param);
 #else
 
 static inline int btintel_check_bdaddr(struct hci_dev *hdev)
@@ -188,4 +189,11 @@ static inline int btintel_read_boot_params(struct hci_dev *hdev,
 {
 	return -EOPNOTSUPP;
 }
+
+static inline int btintel_download_firmware(struct hci_dev *dev,
+					    const struct firmware *fw,
+					    u32 *boot_param)
+{
+	return -EOPNOTSUPP;
+}
 #endif