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 <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>

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

···
 		voltage = <400000>;
 	};
 };
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_pins>;
+	status = "okay";
+};