ARM: dts: sun4i: Add missing timers interrupts

The timer unit in the A10 has 6 interrupts available. List all of them.
Signed-off-by: NMaxime Ripard <maxime.ripard@bootlin.com>

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

@@ -803,7 +803,12 @@
 		timer@1c20c00 {
 			compatible = "allwinner,sun4i-a10-timer";
 			reg = <0x01c20c00 0x90>;
-			interrupts = <22>;
+			interrupts = <22>,
+				     <23>,
+				     <24>,
+				     <25>,
+				     <67>,
+				     <68>;
 			clocks = <&osc24M>;
 		};