dt-bindings: display: drop data-mapping from panel-dpi

data-mapping may not be the best way to describe the
data format used between panels and display interface.

Drop it from the panel-dpi binding so we do not start to rely on it.
We can then work out how to best describe this mapping and when
we know it, we can add it to this binding.

Fixes: fa10224 ("dt-bindings: display: add data-mapping to panel-dpi")
Cc: Sam Ravnborg <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: [email protected]
Signed-off-by: Sam Ravnborg <[email protected]>
Reviewed-by: Laurent Pinchart <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: sravnborg

Documentation/devicetree/bindings/display/panel/panel-dpi.yaml

@@ -21,15 +21,6 @@ properties:
       - {}
       - const: panel-dpi
 
-  data-mapping:
-    enum:
-      - rgb24
-      - rgb565
-      - bgr666
-    description: |
-      Describes the media format, how the display panel is connected
-      to the display interface.
-
   backlight: true
   enable-gpios: true
   height-mm: true
@@ -52,7 +43,6 @@ examples:
         compatible = "osddisplays,osd057T0559-34ts", "panel-dpi";
         label = "osddisplay";
         power-supply = <&vcc_supply>;
-        data-mapping = "rgb565";
         backlight = <&backlight>;
 
         port {