dt-bindings: display: panel: document BOE TV101WUM-LL2 DSI Display Panel

Document the 1200x1920 BOE TV101WUM-LL2 DSI Display Panel found
in the Lenovo Smart Tab M10 tablet. The controller is unknown.

Reviewed-by: Conor Dooley <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Neil Armstrong <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/display/panel/boe,tv101wum-ll2.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/boe,tv101wum-ll2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: BOE TV101WUM-LL2 DSI Display Panel
+
+maintainers:
+  - Neil Armstrong <[e-mail]>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: boe,tv101wum-ll2
+
+  reg:
+    maxItems: 1
+    description: DSI virtual channel
+
+  backlight: true
+  reset-gpios: true
+  vsp-supply: true
+  vsn-supply: true
+  port: true
+  rotation: true
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - vsp-supply
+  - vsn-supply
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        panel@0 {
+            compatible = "boe,tv101wum-ll2";
+            reg = <0>;
+
+            vsn-supply = <&vsn_lcd>;
+            vsp-supply = <&vsp_lcd>;
+
+            reset-gpios = <&pio 45 GPIO_ACTIVE_LOW>;
+
+            port {
+                panel_in: endpoint {
+                    remote-endpoint = <&dsi_out>;
+                };
+            };
+        };
+    };
+
+...