dt-bindings: mmc: mtk-sd: Document extra clocks for MT8189

MT8189 SoC MMC Controller IP has 4 additional clocks.
Describe them in the dt-bindings for this SoC.

Fixes: 7514f64780 ("dt-bindings: mmc: mtk-sd: Add support for MT8189 SoC")
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>

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

@@ -193,7 +193,6 @@ allOf:
             - mediatek,mt8183-mmc
             - mediatek,mt8186-mmc
             - mediatek,mt8188-mmc
-            - mediatek,mt8189-mmc
             - mediatek,mt8195-mmc
             - mediatek,mt8196-mmc
             - mediatek,mt8516-mmc
@@ -348,6 +347,34 @@ allOf:
             - const: axi_cg
             - const: ahb_cg
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8189-mmc
+    then:
+      properties:
+        clocks:
+          minItems: 6
+          items:
+            - description: source clock
+            - description: HCLK which used for host
+            - description: independent source clock gate
+            - description: bus clock used for internal register access
+            - description: peripheral bus clock gate
+            - description: AXI bus clock gate
+            - description: crypto clock used for data encrypt/decrypt (optional)
+        clock-names:
+          minItems: 6
+          items:
+            - const: source
+            - const: hclk
+            - const: source_cg
+            - const: bus_clk
+            - const: pclk_cg
+            - const: axi_cg
+            - const: crypto
+
 unevaluatedProperties: false
 
 examples: