tests: gpio: add lpc845brk overlay for gpio_basic_api

Add overlay for LPC845-BRK board to configure GPIO pins
for gpio_basic_api test.

Signed-off-by: Surya Prakash T <suryat@aerlync.com>
Signed-off-by: Sayooj K Karun <sayooj@aerlync.com>

Author: Surya-Tumma

tests/drivers/gpio/gpio_basic_api/boards/lpc845brk.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2026 Aerlync Labs Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	resources {
+		compatible = "test-gpio-basic-api";
+		out-gpios = <&gpio0 8 0>;
+		in-gpios = <&gpio0 9 0>;
+	};
+};