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/drivers/usb/ohci.c

@@ -102,6 +102,8 @@ ohci_init (pcidev_t addr)
 	if(!controller->instance)
 		fatal("Not enough memory creating USB controller instance.\n");
 
+	controller->type = OHCI;
+
 	controller->start = ohci_start;
 	controller->stop = ohci_stop;
 	controller->reset = ohci_reset;