soc/intel/quark: Add USB device port support

Add initialization for the USB device port.

TEST=Build and run on Galileo Gen2

Change-Id: Icf83747f778f6e1ac976cd448a94311030e79e4f
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/14941
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/quark/include/soc/pci_devs.h

@@ -33,6 +33,9 @@
 /* IO Fabric 1 */
 #define SIO1_DEV		0x14
 #define HSUART1_DEV		SIO1_DEV
+#define USB_DEV_PORT_FUNC	2
+#define EHCI_FUNC		3
+#define OHCI_FUNC		4
 #define HSUART1_FUNC		5
 
 /* IO Fabric 2 */