Bluetooth: btrtl: Create separate module for Realtek BT driver

As already done for btintel and btbcm export setup as separate function
in a vendor-specific module to hold all the Realtek specific commands.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index ed5c273..2e77707 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -9,6 +9,10 @@
 	tristate
 	select FW_LOADER
 
+config BT_RTL
+	tristate
+	select FW_LOADER
+
 config BT_HCIBTUSB
 	tristate "HCI USB driver"
 	depends on USB
@@ -32,6 +36,17 @@
 
 	  Say Y here to compile support for Broadcom protocol.
 
+config BT_HCIBTUSB_RTL
+	bool "Realtek protocol support"
+	depends on BT_HCIBTUSB
+	select BT_RTL
+	default y
+	help
+	  The Realtek protocol support enables firmware and configuration
+	  download support for Realtek Bluetooth controllers.
+
+	  Say Y here to compile support for Realtek protocol.
+
 config BT_HCIBTSDIO
 	tristate "HCI SDIO driver"
 	depends on MMC