ARM: dts: sun4i/sun7i: add RTC node

Add the RTC node to DTS for Allwinner A10 and Allwinner A20.
Signed-off-by: NCarlo Caione <carlo.caione@gmail.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun4i-a10.dtsi

@@ -266,6 +266,12 @@
 			reg = <0x01c20c90 0x10>;
 		};
 
+		rtc: rtc@01c20d00 {
+			compatible = "allwinner,sun4i-rtc";
+			reg = <0x01c20d00 0x20>;
+			interrupts = <24>;
+		};
+
 		sid: eeprom@01c23800 {
 			compatible = "allwinner,sun4i-sid";
 			reg = <0x01c23800 0x10>;

arch/arm/boot/dts/sun7i-a20.dtsi

@@ -265,6 +265,12 @@
 			reg = <0x01c20c90 0x10>;
 		};
 
+		rtc: rtc@01c20d00 {
+			compatible = "allwinner,sun7i-a20-rtc";
+			reg = <0x01c20d00 0x20>;
+			interrupts = <0 24 1>;
+		};
+
 		sid: eeprom@01c23800 {
 			compatible = "allwinner,sun7i-a20-sid";
 			reg = <0x01c23800 0x200>;