usb: Add dial-up networking bridge host driver for PID:9001

This host driver will be used to connect directly to the modem
interface of Qualcomm devices. This will provide a bridge to
the gadget serial driver to enable dial-up networking. Though it
resembles the existing qcserial driver, this is intended only for
inter-driver usage and does not expose any interface to userland.

Change-Id: I8534a2eb0c6b747ff593f7e2efdb56da9ea6dddc
Signed-off-by: Jack Pham <jackp@codeaurora.org>
diff --git a/drivers/usb/misc/Makefile b/drivers/usb/misc/Makefile
index 20ee62a..03568bc 100644
--- a/drivers/usb/misc/Makefile
+++ b/drivers/usb/misc/Makefile
@@ -31,3 +31,5 @@
 
 obj-$(CONFIG_USB_QCOM_DIAG)		+= diag_usb.o
 obj-$(CONFIG_USB_QCOM_DIAG_TEST)	+= diag_bridge_test.o
+obj-$(CONFIG_USB_QCOM_DUN_BRIDGE)	+= dun_bridge.o
+obj-$(CONFIG_USB_QCOM_DUN_BRIDGE_TEST)	+= dun_bridge_test.o