usb: dwc3: Add DWC3 controller driver support

Add support for DWC3 XHCI controller driver

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 4d35d3e..310d979 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -51,6 +51,7 @@
 
 # xhci
 obj-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o
+obj-$(CONFIG_USB_XHCI_DWC3) += xhci-dwc3.o
 obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o
 obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
 obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o