tests: adc: enable adc_api tests for esp32

Enables adc_api tests for these platforms:
- esp32_devkitc/esp32/procpu
- esp32c3_devkitm
- esp32c6_devkitc/esp32c6/hpcore
- esp32h2_devkitm
- esp32s2_devkitc
- esp32s3_devkitc/esp32s3/procpu

Signed-off-by: Marcio Ribeiro <[email protected]>

Author: wmrsouza

tests/drivers/adc/adc_api/boards/esp32s2_devkitc.overlay

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2022 Wolter HV <[email protected]>
  * Copyright (c) 2023 Benjamin Björnsson <[email protected]>
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -33,3 +34,7 @@
 		zephyr,resolution = <12>;
 	};
 };
+
+&spi3 {
+	status = "disabled";
+};

tests/drivers/adc/adc_api/boards/esp32s2_saola.conf

@@ -1,10 +1,9 @@
 #
-# Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
+# Copyright (c) 2024-2025 Espressif Systems (Shanghai) Co., Ltd.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
 
 CONFIG_TEST_USERSPACE=n
-CONFIG_DMA=y
 CONFIG_ADC_ESP32_DMA=y
 CONFIG_HEAP_MEM_POOL_SIZE=16384

tests/drivers/adc/adc_api/boards/esp32s2_saola.overlay

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2022 Wolter HV <[email protected]>
  * Copyright (c) 2023 Benjamin Björnsson <[email protected]>
+ * Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -32,4 +33,10 @@
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,resolution = <12>;
 	};
+
+	dmas = <&dma 2>;
+};
+
+&dma {
+	status = "okay";
 };

tests/drivers/adc/adc_api/boards/esp32s3_devkitm_procpu.conf

@@ -31,4 +31,10 @@
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,resolution = <12>;
 	};
+
+	dmas = <&dma 2>;
+};
+
+&dma {
+	status = "okay";
 };