dt-bindings: phy: qcom, hdmi-phy-other: mark it as clock provider

Eventually all HDMI PHYs are going to provide the HDMI PLL clock to the
MMCC. Add #clock-cells property required to provide the HDMI PLL clock to
other devices.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/519213/
Link: https://lore.kernel.org/r/20230119132219.2479775-3-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Documentation/devicetree/bindings/phy/qcom,hdmi-phy-other.yaml

@@ -43,6 +43,9 @@ properties:
   vddio-supply:
     description: phandle to VDD I/O supply regulator
 
+  '#clock-cells':
+    const: 0
+
   '#phy-cells':
     const: 0
 
@@ -113,6 +116,7 @@ examples:
                   "hdmi_pll";
       reg = <0x4a00400 0x60>,
             <0x4a00500 0x100>;
+      #clock-cells = <0>;
       #phy-cells = <0>;
       power-domains = <&mmcc 1>;
       clock-names = "slave_iface", "pxo";