Add initial support for USB ehci pci

Add USB ehci pci support. This patch doesn't include any
pci_ids and it is not tested on real hardware.

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 6ba154b..26189b6 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -35,6 +35,7 @@
 COBJS-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
 COBJS-$(CONFIG_USB_SL811HS) += sl811_usb.o
 COBJS-$(CONFIG_USB_EHCI_FSL) += usb_ehci_fsl.o
+COBJS-$(CONFIG_USB_EHCI_PCI) += usb_ehci_pci.o
 
 # device
 ifdef CONFIG_USB_DEVICE