ARM: sun7i: add arch timer node

The Allwinner A20 SoC is built around a pair of Cortex-A7 cores,
which have the usual generic timers. Report this in the DT.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

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

@@ -49,6 +49,14 @@ memory {
 		reg = <0x40000000 0x80000000>;
 	};
 
+	timer {
+		compatible = "arm,armv7-timer";
+		interrupts = <1 13 0xf08>,
+			     <1 14 0xf08>,
+			     <1 11 0xf08>,
+			     <1 10 0xf08>;
+	};
+
 	clocks {
 		#address-cells = <1>;
 		#size-cells = <1>;