usb: dwc3: add xHCI Host support

The Designware USB3 IP can be configured with
an internal xHCI. If we're running on such a
version, let's start the xHCI stack.

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 593d1db..0926e71 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -4,11 +4,13 @@
 obj-$(CONFIG_USB_DWC3)			+= dwc3.o
 
 dwc3-y					:= core.o
+dwc3-y					+= host.o
 
 ifneq ($(CONFIG_USB_GADGET_DWC3),)
 	dwc3-y				+= gadget.o ep0.o
 endif
 
+
 ifneq ($(CONFIG_DEBUG_FS),)
 	dwc3-y				+= debugfs.o
 endif