samples: drivers/adc: Support adc example for NXP frdm_mcxa153

Support adc example for NXP frdm_mcxa153

Signed-off-by: Neil Chen <cheng.chen_1@nxp.com>

samples/drivers/adc/adc_dt/boards/frdm_mcxa153.overlay

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+#include <zephyr/dt-bindings/adc/mcux-lpadc.h>
+
+/ {
+	zephyr,user {
+		/* adjust channel number according to pinmux in board.dts */
+		io-channels = <&lpadc0 0>;
+	};
+};
+
+&lpadc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	/*
+	 * To use this sample:
+	 * LPADC0 CH0A is set up in single ended mode
+	 * - Connect LPADC0 CH0A signal to voltage between 0~3.3V (J4 pin 8)
+	 */
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_EXTERNAL0";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <16>;
+		zephyr,input-positive = <MCUX_LPADC_CH0A>;
+	};
+};