ARM: dts: sun8i: v3s: add pwm controller to v3s dts

The Allwinner V3s and V3 SoCs feature a pwm controller identical to the
one used in the Allwinner A20.
This commit adds it to the V3s dtsi.
Signed-off-by: Tobias Schramm <t.schramm@manjaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210513203527.2072090-3-t.schramm@manjaro.org

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

@@ -422,6 +422,15 @@ wdt0: watchdog@1c20ca0 {
 			clocks = <&osc24M>;
 		};
 
+		pwm: pwm@1c21400 {
+			compatible = "allwinner,sun8i-v3s-pwm",
+				     "allwinner,sun7i-a20-pwm";
+			reg = <0x01c21400 0xc>;
+			clocks = <&osc24M>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		lradc: lradc@1c22800 {
 			compatible = "allwinner,sun4i-a10-lradc-keys";
 			reg = <0x01c22800 0x400>;