Add support for DMP Vortex86EX PCI northbridge.

Change-Id: I60675a357f9db430ebb59b17be6d8c92a9cadf43
Signed-off-by: Andrew Wu <arw@dmp.com.tw>
Reviewed-on: http://review.coreboot.org/3511
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/northbridge/dmp/vortex86ex/xgi_oprom.c b/src/northbridge/dmp/vortex86ex/xgi_oprom.c
new file mode 100644
index 0000000..dc814c2
--- /dev/null
+++ b/src/northbridge/dmp/vortex86ex/xgi_oprom.c
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 DMP Electronics Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/********************************************************************
+ * Change the vendor / device IDs to match the XGI Z9S VBIOS header.
+ ********************************************************************/
+#include <device/pci.h>
+u32 map_oprom_vendev(u32 vendev)
+{
+	u32 new_vendev = vendev;
+
+	switch (vendev) {
+	case 0x18ca0020:
+		new_vendev = 0x18ca0021;
+		break;
+	}
+
+	return new_vendev;
+}