dt-bindings: mmc: sdhci-of-dwcmhsc: Add rk3588

Add compatible value for the Rockchip rk3588 dwcmshc controller.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220422170920.401914-8-sebastian.reichel@collabora.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml

@@ -17,6 +17,7 @@ properties:
   compatible:
     enum:
       - rockchip,rk3568-dwcmshc
+      - rockchip,rk3588-dwcmshc
       - snps,dwcmshc-sdhci
 
   reg: