libpayload: add controller type in usbdev_hc

Add controller type (UHCI, OHCI, EHCI or XHCI)
into usbdev_hc (hci_t) struct, so now we know
which type selected controller have. It needed
to access controller specific data, if access
usb tree outside of libpayload (e.g. in payload
intself)

Change-Id: I7df947bbb56a50d0d792ccd4d3a6b021ee95e2ea
Signed-off-by: Anton Kochkov <anton.kochkov@gmail.com>
Reviewed-on: http://review.coreboot.org/1145
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

payloads/libpayload/include/usb/usb.h

@@ -111,10 +111,13 @@ struct usbdev {
 	void (*poll) (usbdev_t *dev);
 };
 
+typedef enum { OHCI = 0, UHCI = 1, EHCI = 2, XHCI = 3} hc_type;
+
 struct usbdev_hc {
 	struct usbdev_hc *next;
 	pcidev_t bus_address;
 	u32 reg_base;
+	hc_type type;
 	usbdev_t *devices[128];	// dev 0 is root hub, 127 is last addressable
 	void (*start) (hci_t *controller);
 	void (*stop) (hci_t *controller);