USB ehci ixp4xx support

Add USB ehci ixp4xx host controller. Test on ixdp465 board.

Signed-off-by: Michael Trimarchi <trimarchimichael@yahoo.it>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 26189b6..0f94963 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -36,6 +36,7 @@
 COBJS-$(CONFIG_USB_SL811HS) += sl811_usb.o
 COBJS-$(CONFIG_USB_EHCI_FSL) += usb_ehci_fsl.o
 COBJS-$(CONFIG_USB_EHCI_PCI) += usb_ehci_pci.o
+COBJS-$(CONFIG_USB_EHCI_IXP4XX) += usb_ehci_ixp.o
 
 # device
 ifdef CONFIG_USB_DEVICE