samples: modules: lvgl: Add support for Smartbond Pro DevKit.

Add overlay file to support the pro devkit. To build the sample
code, one should explicitly select the overlay file at
'west build' invokation via the DTC_OVERLAY_FILE system variable.

Signed-off-by: Ioannis Karachalios <[email protected]>

samples/modules/lvgl/demos/boards/da1469x_dk_pro_mipi_dbi.overlay

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2023 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+ #include <zephyr/dt-bindings/display/ili9xxx.h>
+ #include <zephyr/dt-bindings/gpio/gpio.h>
+
+/ {
+    chosen {
+        zephyr,display = &ili9340;
+    };
+
+    lvgl_pointer {
+        input = <&display_touch>;
+        status = "okay";
+        swap-xy;
+        invert-x;
+        invert-y;
+    };
+};
+
+&i2c2 {
+    clock-frequency = <400000>;
+
+    display_touch: ft6206@38 {
+        compatible = "focaltech,ft5336";
+        status = "okay";
+        reg = <0x38>;
+        int-gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+    };
+};
+
+&mipi_dbi {
+    reset-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+    status = "okay";
+    spi-dev = <&spi2>;
+
+    ili9340: ili9340@0 {
+        compatible = "ilitek,ili9340";
+        mipi-max-frequency = <48000000>;
+        status = "okay";
+        reg = <0>;
+        width = <240>;
+        height = <320>;
+        pixel-format = <ILI9XXX_PIXEL_FORMAT_RGB565>;
+        rotation = <0>;
+    };
+};