dt-bindings: display: synopsys, dw-hdmi: Document ddc-i2c-bus in core

The DW HDMI driver core is responsible for parsing the 'ddc-i2c-bus' property,
move the property description into the DW HDMI common DT schema too, so this
property can be used on all devices integrating the DW HDMI core.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240515062753.111746-1-marex@denx.de

Documentation/devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml

@@ -45,6 +45,14 @@ properties:
       - const: isfr
     additionalItems: true
 
+  ddc-i2c-bus:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      The HDMI DDC bus can be connected to either a system I2C master or the
+      functionally-reduced I2C master contained in the DWC HDMI. When connected
+      to a system I2C master this property contains a phandle to that I2C
+      master controller.
+
   interrupts:
     maxItems: 1
 

Documentation/devicetree/bindings/display/imx/fsl,imx6-hdmi.yaml

@@ -31,14 +31,6 @@ properties:
   clock-names:
     maxItems: 2
 
-  ddc-i2c-bus:
-    $ref: /schemas/types.yaml#/definitions/phandle
-    description:
-      The HDMI DDC bus can be connected to either a system I2C master or the
-      functionally-reduced I2C master contained in the DWC HDMI. When connected
-      to a system I2C master this property contains a phandle to that I2C
-      master controller.
-
   gpr:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:

Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml

@@ -70,14 +70,6 @@ properties:
           - vpll
           - ref
 
-  ddc-i2c-bus:
-    $ref: /schemas/types.yaml#/definitions/phandle
-    description:
-      The HDMI DDC bus can be connected to either a system I2C master or the
-      functionally-reduced I2C master contained in the DWC HDMI. When connected
-      to a system I2C master this property contains a phandle to that I2C
-      master controller.
-
   phys:
     maxItems: 1
     description: The HDMI PHY