USB: XHCI: Add xHCI host controller support for Exynos5

This adds driver layer for xHCI controller in Samsung's
exynos5 soc. This interacts with xHCI host controller stack.

Signed-off-by: Vikas C Sajjan <vikas.sajjan@samsung.com>
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Julius Werner <jwerner@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 6bd6c86..eb50bc1 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -44,6 +44,7 @@
 
 # xhci
 COBJS-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o
+COBJS-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)