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/arch/arm/mach-rockchip/rk3368/Kconfig b/arch/arm/mach-rockchip/rk3368/Kconfig
index 82f902f..7dbeb46 100644
--- a/arch/arm/mach-rockchip/rk3368/Kconfig
+++ b/arch/arm/mach-rockchip/rk3368/Kconfig
@@ -8,10 +8,15 @@
 	help
 	  Sheep board is designed by Rockchip as a EVB board
 	  for rk3368.
+
+config TARGET_GEEKBOX
+	bool "GeekBox"
+
 endchoice
 
 config SYS_SOC
 	default "rockchip"
 
 source "board/rockchip/sheep_rk3368/Kconfig"
+source "board/geekbuying/geekbox/Kconfig"
 endif