dt-bindings: display: st7701: Add Anbernic RG-ARC panel

The RG-ARC panel is a panel specific to the Anbernic RG-ARC. It is 4
inches in size (diagonally) with a resolution of 480x640.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231208154847.130615-3-macroalpha82@gmail.comSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231208154847.130615-3-macroalpha82@gmail.com

Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml

@@ -27,6 +27,7 @@ properties:
   compatible:
     items:
       - enum:
+          - anbernic,rg-arc-panel
           - densitron,dmt028vghmcmi-1a
           - elida,kd50t048a
           - techstar,ts8550b