tests: drivers: adc: nrf54lv10a: align to non-gain configuration

This SoC supports gain equal to `1` only.

Signed-off-by: Nikodem Kastelik <[email protected]>

Author: nika-nordic

tests/zephyr/drivers/adc/adc_accuracy_test/boards/nrf54lv10dk_nrf54lv10a_cpuapp.overlay

@@ -19,7 +19,7 @@
 
 	channel@0 {
 		reg = <0>;
-		zephyr,gain = "ADC_GAIN_1_2";
+		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,input-positive = <NRF_SAADC_AIN2>;

tests/zephyr/drivers/adc/adc_api/boards/nrf54lv10dk_nrf54lv10a_cpuapp.overlay

@@ -26,7 +26,7 @@
 
 	channel@1 {
 		reg = <1>;
-		zephyr,gain = "ADC_GAIN_1_4";
+		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_EXTERNAL0";
 		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
 		zephyr,input-positive = <NRF_SAADC_AIN4>;
@@ -35,7 +35,7 @@
 
 	channel@2 {
 		reg = <2>;
-		zephyr,gain = "ADC_GAIN_2_3";
+		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
 		zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 10)>;
 		zephyr,input-positive = <NRF_SAADC_AIN2>;