dt-bindings: mmc: mtk-sd: Add mt7988 SoC

Add binding definitions for mmc on MT7988 SoC.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Message-ID: <20241012143826.7690-2-linux@fw-web.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/mtk-sd.yaml

@@ -21,6 +21,7 @@ properties:
           - mediatek,mt7620-mmc
           - mediatek,mt7622-mmc
           - mediatek,mt7986-mmc
+          - mediatek,mt7988-mmc
           - mediatek,mt8135-mmc
           - mediatek,mt8173-mmc
           - mediatek,mt8183-mmc
@@ -265,6 +266,27 @@ allOf:
             - const: bus_clk
             - const: sys_cg
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt7988-mmc
+    then:
+      properties:
+        clocks:
+          items:
+            - description: source clock
+            - description: HCLK which used for host
+            - description: Advanced eXtensible Interface
+            - description: Advanced High-performance Bus clock
+        clock-names:
+          items:
+            - const: source
+            - const: hclk
+            - const: axi_cg
+            - const: ahb_cg
+
   - if:
       properties:
         compatible: