dt-bindings: phy: mediatek,hdmi-phy: Document extra clocks for MT8195

MT8195's HDMI PHY block has 4 clocks instead of just a single one.
Describe the extra clocks for it.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20251217-mtk-genio-evk-hdmi-support-v2-3-a994976bb39a@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml

@@ -38,12 +38,20 @@ properties:
     maxItems: 1
 
   clocks:
+    minItems: 1
     items:
       - description: PLL reference clock
+      - description: HDMI 26MHz clock
+      - description: HDMI PLL1 clock
+      - description: HDMI PLL2 clock
 
   clock-names:
+    minItems: 1
     items:
       - const: pll_ref
+      - const: 26m
+      - const: pll1
+      - const: pll2
 
   clock-output-names:
     maxItems: 1
@@ -79,6 +87,20 @@ required:
   - "#phy-cells"
   - "#clock-cells"
 
+allOf:
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              const: mediatek,mt8195-hdmi-phy
+    then:
+      properties:
+        clocks:
+          maxItems: 1
+        clock-names:
+          maxItems: 1
+
 additionalProperties: false
 
 examples: