rush_ryu: Add new mainboard

This is a clone of rush for the time being. All the incompatible
bits can be moved later. Additional patches to follow.

BUG=chrome-os-partner:30569
BRANCH=None
TEST=Built coreboot for rush_ryu board

Original-Change-Id: Iae56d016d0c328d83242b95f307fefaa8c68deec
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/207838
Original-Reviewed-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit cf2b88963743e40a35d841ef522172cb2448abbf)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I92a8b4d31fac4a25e3afa3b6e158e1dba0f80aab
Reviewed-on: http://review.coreboot.org/8594
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/mainboard/google/rush_ryu/mainboard.c

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google 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
+ */
+
+#include <device/device.h>
+#include <boot/coreboot_tables.h>
+
+static void mainboard_init(device_t dev)
+{
+}
+
+static void mainboard_enable(device_t dev)
+{
+        dev->ops->init = &mainboard_init;
+}
+
+struct chip_operations mainboard_ops = {
+        .name   = "rush",
+        .enable_dev = mainboard_enable,
+};