arm64: dts: rockchip: add rk3368 evaluation board

This board is similar with the rk3288 evb board but the rk3368 top
board. There exist the act8846 as the pmic.

Moment, add the balight/thermal/emmc/usb.. stuff,
Let the board can happy work.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
diff --git a/Documentation/devicetree/bindings/arm/rockchip.txt b/Documentation/devicetree/bindings/arm/rockchip.txt
index 8e985dd..c40c091 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.txt
+++ b/Documentation/devicetree/bindings/arm/rockchip.txt
@@ -69,6 +69,10 @@
 		     "google,veyron-speedy-rev3", "google,veyron-speedy-rev2",
 		     "google,veyron-speedy", "google,veyron", "rockchip,rk3288";
 
+- Rockchip RK3368 evb:
+    Required root node properties:
+      - compatible = "rockchip,rk3368-evb-act8846", "rockchip,rk3368";
+
 - Rockchip R88 board:
     Required root node properties:
       - compatible = "rockchip,r88", "rockchip,rk3368";