dt-bindings: net: mediatek-dwmac: add support for mt8188

Add binding document for the ethernet on mt8188
Signed-off-by: Jianguo Zhang <jianguo.zhang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/mediatek-dwmac.yaml

@@ -19,6 +19,7 @@ select:
       contains:
         enum:
           - mediatek,mt2712-gmac
+          - mediatek,mt8188-gmac
           - mediatek,mt8195-gmac
   required:
     - compatible
@@ -37,6 +38,11 @@ properties:
           - enum:
               - mediatek,mt8195-gmac
           - const: snps,dwmac-5.10a
+      - items:
+          - enum:
+              - mediatek,mt8188-gmac
+          - const: mediatek,mt8195-gmac
+          - const: snps,dwmac-5.10a
 
   clocks:
     minItems: 5
@@ -74,7 +80,7 @@ properties:
       or will round down. Range 0~31*170.
       For MT2712 RMII/MII interface, Allowed value need to be a multiple of 550,
       or will round down. Range 0~31*550.
-      For MT8195 RGMII/RMII/MII interface, Allowed value need to be a multiple of 290,
+      For MT8188/MT8195 RGMII/RMII/MII interface, Allowed value need to be a multiple of 290,
       or will round down. Range 0~31*290.
 
   mediatek,rx-delay-ps:
@@ -84,7 +90,7 @@ properties:
       or will round down. Range 0~31*170.
       For MT2712 RMII/MII interface, Allowed value need to be a multiple of 550,
       or will round down. Range 0~31*550.
-      For MT8195 RGMII/RMII/MII interface, Allowed value need to be a multiple
+      For MT8188/MT8195 RGMII/RMII/MII interface, Allowed value need to be a multiple
       of 290, or will round down. Range 0~31*290.
 
   mediatek,rmii-rxc: