dt-bindings: arm: rockchip: Add Sonoff iHost

Sonoff iHost is a smart home hub with built in radios for wifi/bt
and Zigbee. It is based off the Rockchip RV1126 (or RV1109) SoC.
Signed-off-by: Tim Lunn <tim@feathertop.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231203124004.2676174-9-tim@feathertop.orgSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -927,6 +927,13 @@ properties:
           - const: rockchip,rk3568-bpi-r2pro
           - const: rockchip,rk3568
 
+      - description: Sonoff iHost Smart Home Hub
+        items:
+          - const: itead,sonoff-ihost
+          - enum:
+              - rockchip,rv1126
+              - rockchip,rv1109
+
 additionalProperties: true
 
 ...