dt-bindings: riscv: starfive: add Milkv Mars board

Add device tree bindings for the Milkv Mars board which is
equipped with StarFive JH7110 SoC.

Signed-off-by: Jisheng Zhang <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Emil Renner Berthing <[email protected]>
Signed-off-by: Conor Dooley <[email protected]>

Author: xhackerustc

Documentation/devicetree/bindings/riscv/starfive.yaml

@@ -26,6 +26,7 @@ properties:
 
       - items:
           - enum:
+              - milkv,mars
               - starfive,visionfive-2-v1.2a
               - starfive,visionfive-2-v1.3b
           - const: starfive,jh7110