samples: basic: blinky: modify to use eGPIO

Modify blinky sample to use emulated GPIO.

Signed-off-by: Magdalena Pastula <magdalena.pastula@nordicsemi.no>

samples/basic/blinky/boards/nrf54l15pdk_nrf54l15_cpuapp.overlay

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	soc {
+		reserved-memory {
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			sram_rx: memory@20018000 {
+				reg = <0x20018000 0x0800>;
+			};
+
+			sram_tx: memory@20020000 {
+				reg = <0x20020000 0x0800>;
+			};
+		};
+	};
+
+	ipc {
+		ipc0: ipc0 {
+			compatible = "zephyr,ipc-icmsg";
+			tx-region = <&sram_tx>;
+			rx-region = <&sram_rx>;
+			mboxes = <&cpuapp_vevif_rx 15>, <&cpuapp_vevif_tx 16>;
+			mbox-names = "rx", "tx";
+			status = "okay";
+		};
+	};
+};
+
+&gpio2 {
+	status = "disabled";
+};
+
+&egpio {
+	status = "okay";
+};
+
+&cpuapp_vevif_rx {
+	status = "okay";
+};
+
+&cpuapp_vevif_tx {
+	status = "okay";
+};
+
+&led0 {
+	gpios = <&egpio 9 GPIO_ACTIVE_HIGH>;
+};