ARM: dts: at91: sama5d27_som1_ek: enable ADC node

Enable the ADC for AN pins on Mikrobus1 and Mikrobus2 on the board.
These correspond to channels AD6 and AD7 in the controller.

 # cat /sys/bus/iio/devices/iio\:device0/in_voltage6_raw
 240
 # cat /sys/bus/iio/devices/iio\:device0/in_voltage7_raw
 16380
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210622101742.14535-1-eugen.hristev@microchip.com

arch/arm/boot/dts/at91-sama5d27_som1_ek.dts

@@ -224,8 +224,10 @@ i2c1: i2c@fc028000 {
 			adc: adc@fc030000 {
 				vddana-supply = <&vddana>;
 				vref-supply = <&advref>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_mikrobus1_an &pinctrl_mikrobus2_an>;
 
-				status = "disabled";
+				status = "okay";
 			};
 
 			pinctrl@fc038000 {