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/dts/Makefile b/arch/arm/dts/Makefile
index 7655d4d..51e21bc 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -42,6 +42,7 @@
 	rk3288-veyron-minnie.dtb \
 	rk3328-evb.dtb \
 	rk3368-sheep.dtb \
+	rk3368-geekbox.dtb \
 	rk3399-evb.dtb \
 	rk3399-firefly.dtb \
 	rk3399-puma.dtb