dt-bindings: display: panel: Add NewVision NV3051D bindings

Add documentation for the NewVision NV3051D panel bindings.
Note that for the two expected consumers of this panel binding
the underlying LCD model is unknown. Name "anbernic,rg353p-panel"
is used because the hardware itself is known as "anbernic,rg353p".
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20221111203130.9615-3-macroalpha82@gmail.com

Documentation/devicetree/bindings/display/panel/newvision,nv3051d.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/newvision,nv3051d.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NewVision NV3051D based LCD panel
+
+description: |
+  The NewVision NV3051D is a driver chip used to drive DSI panels. For now,
+  this driver only supports the 640x480 panels found in the Anbernic RG353
+  based devices.
+
+maintainers:
+  - Chris Morgan <macromorgan@hotmail.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - anbernic,rg353p-panel
+          - anbernic,rg353v-panel
+      - const: newvision,nv3051d
+
+  reg: true
+  backlight: true
+  port: true
+  reset-gpios:
+    description: Active low reset GPIO
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+  - backlight
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        panel@0 {
+            compatible = "anbernic,rg353p-panel", "newvision,nv3051d";
+            reg = <0>;
+            backlight = <&backlight>;
+            reset-gpios = <&gpio4 0 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&vcc3v3_lcd>;
+
+            port {
+                mipi_in_panel: endpoint {
+                    remote-endpoint = <&mipi_out_panel>;
+                };
+            };
+        };
+    };
+
+...