dt-bindings: display: sun8i-a83t-dw-hdmi: Reference dw-hdmi YAML schema

Replace the reference to the DWC HDMI text DT binding with a reference
to the YAML equivalent.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>

Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-dw-hdmi.yaml

@@ -12,8 +12,8 @@ description: |
   and CEC.
 
   These DT bindings follow the Synopsys DWC HDMI TX bindings defined
-  in Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with
-  the following device-specific properties.
+  in bridge/synopsys,dw-hdmi.yaml with the following device-specific
+  properties.
 
 maintainers:
   - Chen-Yu Tsai <wens@csie.org>