ARM: dts: sunxi: Enable PWM controller on Q8 format tablets

Q8 format tablets use channel 0 of the PWM controller for backlight dimming.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sunxi-q8-common.dtsi

@@ -75,3 +75,9 @@ button@400 {
 		voltage = <400000>;
 	};
 };
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_pins>;
+	status = "okay";
+};