[Bluetooth] Add generic driver for Bluetooth USB devices

This patch adds a new generic driver for Bluetooth USB devices. This
driver is still experimental at this point, but it is cleaner and
easier to maintain than the current Bluetooth USB driver. It is a
much better starting point for power management improvements.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/Kconfig

@@ -22,6 +22,19 @@ config BT_HCIUSB_SCO
 
 	  Say Y here to compile support for SCO over HCI USB.
 
+config BT_HCIBTUSB
+	tristate "HCI USB driver (alternate version)"
+	depends on USB && EXPERIMENTAL && BT_HCIUSB=n
+	help
+	  Bluetooth HCI USB driver.
+	  This driver is required if you want to use Bluetooth devices with
+	  USB interface.
+
+          This driver is still experimental and has no SCO support.
+
+	  Say Y here to compile support for Bluetooth USB devices into the
+	  kernel or say M to compile it as module (btusb).
+
 config BT_HCIBTSDIO
 	tristate "HCI SDIO driver"
 	depends on MMC

drivers/bluetooth/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_BT_HCIBT3C)	+= bt3c_cs.o
 obj-$(CONFIG_BT_HCIBLUECARD)	+= bluecard_cs.o
 obj-$(CONFIG_BT_HCIBTUART)	+= btuart_cs.o
 
+obj-$(CONFIG_BT_HCIBTUSB)	+= btusb.o
 obj-$(CONFIG_BT_HCIBTSDIO)	+= btsdio.o
 
 hci_uart-y				:= hci_ldisc.o