dt-bindings: mfd: syscon: Add StarFive JH7100 sysmain compatible

Document StarFive JH7100 SoC compatible for sysmain registers.
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230211031821.976408-7-cristian.ciocaltea@collabora.com

Documentation/devicetree/bindings/mfd/syscon.yaml

@@ -67,6 +67,7 @@ properties:
               - rockchip,rk3568-qos
               - rockchip,rk3588-qos
               - rockchip,rv1126-qos
+              - starfive,jh7100-sysmain
 
           - const: syscon