samples: drivers: adc: sequence: use fully qualified board names

Use fully qualified boards names for boards with more than one SoC.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

Author: henrikbrixandersen

samples/drivers/adc/adc_sequence/boards/sam_e70_xplained.conf renamed to samples/drivers/adc/adc_sequence/boards/sam_e70_xplained_same70q21.conf

@@ -0,0 +1 @@
+CONFIG_SEQUENCE_RESOLUTION=12

samples/drivers/adc/adc_sequence/boards/sam_e70_xplained.overlay renamed to samples/drivers/adc/adc_sequence/boards/sam_e70_xplained_same70q21.overlay

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2024 Centro de Inovacao EDGE
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		adc0 = &afec0;
+	};
+};
+
+&afec0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+	};
+
+	channel@8 {
+		reg = <8>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+	};
+};