ARM: dts: v3s: Change the timers compatible

Unlike the A10 that has 6 timers available, the v3s has only three, with only
three interrupts. Let's change the compatible to reflect that, and add the
missing interrupts.
Signed-off-by: NMaxime Ripard <maxime.ripard@bootlin.com>

arch/arm/boot/dts/sun8i-v3s.dtsi

@@ -327,10 +327,11 @@
 		};
 
 		timer@1c20c00 {
-			compatible = "allwinner,sun4i-a10-timer";
+			compatible = "allwinner,sun8i-v3s-timer";
 			reg = <0x01c20c00 0xa0>;
 			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>,
-				     <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+				     <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&osc24M>;
 		};