ARM: dts: at91: sama5d2: add ADC hw trigger edge type

Added ADTRG edge type property as interrupt edge type value
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>

arch/arm/boot/dts/sama5d2.dtsi

@@ -1430,6 +1430,7 @@ adc: adc@fc030000 {
 				atmel,min-sample-rate-hz = <200000>;
 				atmel,max-sample-rate-hz = <20000000>;
 				atmel,startup-time-ms = <4>;
+				atmel,trigger-edge-type = <IRQ_TYPE_EDGE_RISING>;
 				status = "disabled";
 			};