samples: modules: lvgl: demos: add support for ek_ra8p1

Add support for ek_ra8p1/r7ka8p1kflcac/cm85 running on
rtklcdpar1s00001be display shield

Signed-off-by: Khoa Nguyen <khoa.nguyen.xh@renesas.com>

samples/modules/lvgl/demos/boards/ek_ra8p1_r7ka8p1kflcac_cm85.conf

@@ -0,0 +1,7 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_LV_Z_MEM_POOL_SIZE=245760
+CONFIG_LV_DRAW_LAYER_SIMPLE_BUF_SIZE=49152
+CONFIG_MAIN_STACK_SIZE=8192
+CONFIG_IDLE_STACK_SIZE=1024

samples/modules/lvgl/demos/rtklcdpar1s00001be.overlay

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2025 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	lvgl_pointer {
+		compatible = "zephyr,lvgl-pointer-input";
+		swap-xy;
+		input = <&ft5336_rtklcdpar1s00001be>;
+	};
+};

samples/modules/lvgl/demos/sample.yaml

@@ -70,3 +70,15 @@ tests:
       - CONFIG_LV_DEMO_MUSIC_LANDSCAPE=y
     tags:
       - shield
+  sample.modules.lvgl.demos.rtklcdpar1s00001be:
+    platform_allow: ek_ra8p1/r7ka8p1kflcac/cm85
+    harness: console
+    harness_config:
+      fixture: fixture_display
+    extra_args:
+      - SHIELD=rtklcdpar1s00001be
+      - DTC_OVERLAY_FILE=rtklcdpar1s00001be.overlay
+    extra_configs:
+      - CONFIG_LV_DEMO_MUSIC_LANDSCAPE=y
+    tags:
+      - shield