usb, ohci, pci: add DM support for PCI-based OHCI USB controller

add new DM based PCI driver ohci-pci for PCI-based
OHCI USB support.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 6aa574f..dd13528 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -16,6 +16,7 @@
 obj-$(CONFIG_USB_SL811HS) += sl811-hcd.o
 obj-$(CONFIG_USB_OHCI_EP93XX) += ohci-ep93xx.o
 obj-$(CONFIG_USB_OHCI_LPC32XX) += ohci-lpc32xx.o
+obj-$(CONFIG_USB_OHCI_PCI) += ohci-pci.o
 obj-$(CONFIG_USB_OHCI_GENERIC) += ohci-generic.o
 
 # echi