dt-bindings: arm: realtek: Add Realtek Horseradish EVB

Define a compatible string for Realtek Horseradish EVB for RTD1195 SoC.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>

Documentation/devicetree/bindings/arm/realtek.yaml

@@ -18,6 +18,7 @@ properties:
       - items:
           - enum:
               - mele,x1000 # MeLE X1000
+              - realtek,horseradish # Realtek Horseradish EVB
           - const: realtek,rtd1195
 
       # RTD1293 SoC based boards