rockchip: Add support for Raxda Rock 2

This board includes an RK3288 SoC on a SOM. It can be mounted on a
base-board which provides a wide range of peripherals.

So far this is verified to boot to a prompt from a microSD card. The serial
console works as well as HDMI.

Thanks to Tom Cubie for sending me a board.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/radxa/rock2/rock2.c b/board/radxa/rock2/rock2.c
new file mode 100644
index 0000000..5119e95
--- /dev/null
+++ b/board/radxa/rock2/rock2.c
@@ -0,0 +1,7 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>