dt-bindings: display: ingenic,jz4780-hdmi: Drop undocumented 'ddc-i2c-bus'

While 'ddc-i2c-bus' is a common property, it should be in a connector
node rather than the HDMI bridge node as the I2C bus goes to a
connector and not the HDMI block. Drop it from the example.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220525205626.2482584-1-robh@kernel.org

Documentation/devicetree/bindings/display/bridge/ingenic,jz4780-hdmi.yaml

@@ -55,7 +55,6 @@ examples:
         compatible = "ingenic,jz4780-dw-hdmi";
         reg = <0x10180000 0x8000>;
         reg-io-width = <4>;
-        ddc-i2c-bus = <&i2c4>;
         interrupt-parent = <&intc>;
         interrupts = <3>;
         clocks = <&cgu JZ4780_CLK_AHB0>, <&cgu JZ4780_CLK_HDMI>;