ARM: dts: at91: sama5d3: use proper ADC compatible

The ADC is different from the at91sam9x5 ADC. Not only it doesn't have the
same resolution but it even has only one and the LOWRES bit doesn't exist.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Link: https://lore.kernel.org/r/20201128222818.1910764-9-alexandre.belloni@bootlin.com
(cherry picked from commit 53de2d1)
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>

Author: alexandrebelloni

arch/arm/boot/dts/sama5d3.dtsi

@@ -307,7 +307,7 @@
 			adc0: adc@f8018000 {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "atmel,at91sam9x5-adc";
+				compatible = "atmel,sama5d3-adc";
 				reg = <0xf8018000 0x100>;
 				interrupts = <29 IRQ_TYPE_LEVEL_HIGH 5>;
 				pinctrl-names = "default";