dt-bindings: add rk3399-q7 SoM

RK3399-Q7 is a Qseven compatible system-on-module by Theobroma Systems.

This adds the module and the EVK baseboard "Haikou"

Signed-off-by: Klaus Goger <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Heiko Stuebner <[email protected]>

Author: kgoger

Documentation/devicetree/bindings/arm/rockchip.txt

@@ -181,6 +181,10 @@ Rockchip platforms device tree bindings
     Required root node properties:
       - compatible = "rockchip,rk3399-sapphire-excavator", "rockchip,rk3399";
 
+- Theobroma Systems RK3399-Q7 Haikou Baseboard:
+    Required root node properties:
+      - compatible = "tsd,rk3399-q7-haikou", "rockchip,rk3399";
+
 - Tronsmart Orion R68 Meta
     Required root node properties:
       - compatible = "tronsmart,orion-r68-meta", "rockchip,rk3368";