southbridge/intel/bd82x6x native usb init: replace some magic values

Some magic numbers are documented in the PCH datasheet so use them.

Change-Id: I15b58ff99b3bc11ac437e5ea74f4f01b7c02032a
Signed-off-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-on: http://review.coreboot.org/8307
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/southbridge/intel/bd82x6x/pch.h b/src/southbridge/intel/bd82x6x/pch.h
index 7cde7bc..cfdea7c 100644
--- a/src/southbridge/intel/bd82x6x/pch.h
+++ b/src/southbridge/intel/bd82x6x/pch.h
@@ -438,6 +438,12 @@
 #define PCH_DISABLE_MEI1	(1 << 1)
 #define PCH_ENABLE_DBDF		(1 << 0)
 
+/* USB Port Disable Override */
+#define USBPDO		0x359c	/* 32bit */
+/* USB Overcurrent MAP Register */
+#define USBOCM1		0x35a0	/* 32bit */
+#define USBOCM2		0x35a4	/* 32bit */
+
 /* ICH7 GPIOBASE */
 #define GPIO_USE_SEL	0x00
 #define GP_IO_SEL	0x04