dt-bindings: phy: rockchip,rk3588-hdptx-phy: Add #clock-cells

The HDMI PHY can be used as a clock provider on RK3588 SoC, hence add
the necessary '#clock-cells' property.

Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Cristian Ciocaltea <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: cristicc

Documentation/devicetree/bindings/phy/rockchip,rk3588-hdptx-phy.yaml

@@ -27,6 +27,9 @@ properties:
       - const: ref
       - const: apb
 
+  "#clock-cells":
+    const: 0
+
   "#phy-cells":
     const: 0