arm64: dts: qcom: sc7180-trogdor-quackingstick: use just "port" in panel

The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:

  sc7180-trogdor-quackingstick-r0.dtb: panel@0: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-5-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/sc7180-trogdor-quackingstick.dtsi

@@ -65,14 +65,9 @@ panel: panel@0 {
 		backlight = <&backlight>;
 		rotation = <270>;
 
-		ports {
-			#address-cells = <1>;
-			#size-cells = <0>;
-			port@0 {
-				reg = <0>;
-				panel_in: endpoint {
-					remote-endpoint = <&dsi0_out>;
-				};
+		port {
+			panel_in: endpoint {
+				remote-endpoint = <&dsi0_out>;
 			};
 		};
 	};