test: drivers: pwm: Enable test cases for frdm_mcxw71

Enable pwm_api and pwm_loopback test.
All test cases passed.

Signed-off-by: Felix Wang <[email protected]>

Author: FelixWang47831

tests/drivers/pwm/pwm_api/boards/frdm_mcxw71.overlay

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+/ {
+	aliases {
+		pwm-1 = &tpm1;
+	};
+};
+
+&pinctrl {
+	tpm1_default: tpm1_default {
+		group0 {
+			pinmux = <TPM1_CH0_PTB0>,
+					 <TPM1_CH2_PTB2>;
+			drive-strength = "low";
+			slew-rate = "slow";
+		};
+	};
+};
+
+&tpm1 {
+	status = "okay";
+	pinctrl-0 = <&tpm1_default>;
+	pinctrl-names = "default";
+};

tests/drivers/pwm/pwm_loopback/boards/frdm_mcxw71.overlay

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	tpm0_default: tpm0_default {
+		group0 {
+			pinmux = <TPM0_CH0_PTA21>,
+					<TPM0_CH1_PTA20>,
+					<TPM0_CH2_PTA19>,
+					<TPM0_CH3_PTA18>;
+			drive-strength = "low";
+			slew-rate = "slow";
+		};
+	};
+};
+
+/* To test this sample, connect
+ * PTA18(J2-9) ---> PTA21(J1-8)
+ */
+
+/ {
+	pwm_loopback_0 {
+		compatible = "test-pwm-loopback";
+		pwms = <&tpm0 3 0 PWM_POLARITY_NORMAL>, /* PTA18 J2 pin 9, out */
+			<&tpm0 0 0 PWM_POLARITY_NORMAL>; /* PTA21 J1 pin 8, in */
+	};
+};
+
+&tpm0 {
+	status = "okay";
+	compatible = "nxp,kinetis-tpm";
+    #pwm-cells = <3>;
+	pinctrl-0 = <&tpm0_default>;
+	pinctrl-names = "default";
+};