dt-bindings: display: Add Powkiddy RGB10MAX3 panel

The RGB10MAX3 panel is a panel specific to the Powkiddy RGB10MAX3
handheld device that measures 5 inches diagonally with a resolution
of 720x1280.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240212184950.52210-2-macroalpha82@gmail.com

Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.yaml

@@ -22,6 +22,8 @@ properties:
     enum:
       # Anberic RG353V-V2 5.0" 640x480 TFT LCD panel
       - anbernic,rg353v-panel-v2
+      # Powkiddy RGB10MAX3 5.0" 720x1280 TFT LCD panel
+      - powkiddy,rgb10max3-panel
       # Powkiddy RGB30 3.0" 720x720 TFT LCD panel
       - powkiddy,rgb30-panel
       # Rocktech JH057N00900 5.5" 720x1440 TFT LCD panel