tests: drivers: pwm: gpio_loopback: Add support for nrf7120pdk

Add overlays for nrf7120pdk_nrf7120 cpuapp, cpuflpr.

Signed-off-by: David Jewsbury <[email protected]>

Author: Hi-Im-David

tests/drivers/pwm/gpio_loopback/boards/nrf7120pdk_nrf7120_cpuapp.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include <zephyr/dt-bindings/pwm/pwm.h>
+#include <zephyr/dt-bindings/gpio/nordic-nrf-gpio.h>
+
+/ {
+	pwm_to_gpio_loopback: pwm_to_gpio_loopback {
+		compatible = "test-pwm-to-gpio-loopback";
+		pwms = <&pwm20 0 0 PWM_POLARITY_NORMAL>;
+		gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+	};
+};

tests/drivers/pwm/gpio_loopback/boards/nrf7120pdk_nrf7120_cpuflpr.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include <zephyr/dt-bindings/pwm/pwm.h>
+#include <zephyr/dt-bindings/gpio/nordic-nrf-gpio.h>
+
+/ {
+	pwm_to_gpio_loopback: pwm_to_gpio_loopback {
+		compatible = "test-pwm-to-gpio-loopback";
+		pwms = <&pwm20 0 0 PWM_POLARITY_NORMAL>;
+		gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&uart30 {
+	/delete-property/ hw-flow-control;
+};

tests/drivers/pwm/gpio_loopback/testcase.yaml

@@ -16,9 +16,11 @@ tests:
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
       - nrf54l20pdk/nrf54l20/cpuapp
+      - nrf7120pdk/nrf7120/cpuapp
     integration_platforms:
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf7120pdk/nrf7120/cpuapp
 
   drivers.pwm.gpio_loopback.fast_p7_0:
     platform_allow: