USB: split some pci specific pieces out of hcd.c into a separate file.

drivers/usb/core/Makefile

@@ -2,11 +2,15 @@
 # Makefile for USB Core files and filesystem
 #
 
-export-objs	:= usb.o hcd.o urb.o message.o config.o
+export-objs	:= usb.o hcd.o hcd-pci.o urb.o message.o config.o
 
 usbcore-objs	:= usb.o usb-debug.o hub.o hcd.o urb.o message.o \
 			config.o
 
+ifeq ($(CONFIG_PCI),y)
+	usbcore-objs	+= hcd-pci.o
+endif
+
 ifeq ($(CONFIG_USB_DEVICEFS),y)
 	usbcore-objs	+= devio.o inode.o drivers.o devices.o
 endif

drivers/usb/core/hcd.h

@@ -161,6 +161,11 @@ struct hc_driver {
 };
 
 extern void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb);
+extern void usb_init_bus (struct usb_bus *bus);
+extern void usb_rh_status_dequeue (struct usb_hcd *hcd, struct urb *urb);
+
+extern spinlock_t hcd_data_lock;
+extern struct usb_operations hcd_operations;
 
 #ifdef CONFIG_PCI
 struct pci_dev;