[Bluetooth] Support for Digianswer BPA 100/105 sniffers

This adds a driver for the Digianswer BPA 100/105 USB sniffer
devices. These devices are using a H:4 over H:2 host transport
protocol for the HCI communication.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/Kconfig

@@ -75,6 +75,17 @@ config BT_HCIBCM203X
 	  Say Y here to compile support for HCI BCM203x devices into the
 	  kernel or say M to compile it as module (bcm203x).
 
+config BT_HCIBPA10X
+	tristate "HCI BPA10x USB driver"
+	depends on USB
+	help
+	  Bluetooth HCI BPA10x USB driver.
+	  This driver provides support for the Digianswer BPA 100/105 Bluetooth
+	  sniffer devices.
+
+	  Say Y here to compile support for HCI BPA10x devices into the
+	  kernel or say M to compile it as module (bpa10x).
+
 config BT_HCIBFUSB
 	tristate "HCI BlueFRITZ! USB driver"
 	depends on USB

drivers/bluetooth/Makefile

@@ -6,6 +6,7 @@ obj-$(CONFIG_BT_HCIUSB)		+= hci_usb.o
 obj-$(CONFIG_BT_HCIVHCI)	+= hci_vhci.o
 obj-$(CONFIG_BT_HCIUART)	+= hci_uart.o
 obj-$(CONFIG_BT_HCIBCM203X)	+= bcm203x.o
+obj-$(CONFIG_BT_HCIBPA10X)	+= bpa10x.o
 obj-$(CONFIG_BT_HCIBFUSB)	+= bfusb.o
 obj-$(CONFIG_BT_HCIDTL1)	+= dtl1_cs.o
 obj-$(CONFIG_BT_HCIBT3C)	+= bt3c_cs.o