rockchip: rk3368: Add initial support for RK3368 based GeekBox

The GeekBox is a TV box from GeekBuying, based on an MXM3 module.
The module can be used with base boards such as the GeekBox Landingship.
This adds basic support to chain-load U-Boot from Rockchip's miniloader.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/geekbuying/geekbox/Kconfig b/board/geekbuying/geekbox/Kconfig
new file mode 100644
index 0000000..41aa8fb
--- /dev/null
+++ b/board/geekbuying/geekbox/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_GEEKBOX
+
+config SYS_BOARD
+	default "geekbox"
+
+config SYS_VENDOR
+	default "geekbuying"
+
+config SYS_CONFIG_NAME
+	default "geekbox"
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+
+endif