OMAP5: USB: Add OMAP xHCI file and header

Add the OMAP file for the xHCI Host controller
This code will initilialize the proper components within the
OMAP5 to enable the xHCI host controller.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index eb50bc1..328752c 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -45,6 +45,7 @@
 # xhci
 COBJS-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o
 COBJS-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
+COBJS-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)