tests: drivers: gpio: gpio_basic_api: Add support for kv260

Add gpio driver testcase support for kv260. The overlay will select the
PS gpio bank to be tested.

For running this testcase on kv260 PS gpio bank 3 has been chosen
because it is EMIO and design is required to connect pins together.

Signed-off-by: Paul Alvin <[email protected]>

Author: AlvinPaul26

boards/amd/kv260_r5/kv260_r5.yaml

@@ -8,6 +8,7 @@ flash: 32768
 supported:
   - i2c
   - eeprom
+  - gpio
 testing:
   ignore_tags:
     - net

tests/drivers/gpio/gpio_basic_api/boards/kv260_r5.overlay

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2025 Advanced Micro Devices, Inc. (AMD)
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	loop {
+		compatible = "test-gpio-basic-api";
+
+		out-gpios = <&psgpio_bank3 0 0>; /* GPIOPS BANK 3 PIN 0 */
+		in-gpios = <&psgpio_bank3 1 0>; /* GPIOPS BANK 3 PIN 1 */
+	};
+};