ARM: dts: imx6dl-prtvt7: fix PWM cell count for the backlight node.

At some point PWM cell count was changed, but it didn't triggered any
error, since this DT was overwriting "#pwm-cells".
To make sure, we are in sync with the kernel driver, remove this
property and fix the pwm consumer.

Signed-off-by: Oleksij Rempel <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6dl-prtvt7.dts

···
 
 	backlight_lcd: backlight-lcd {
 		compatible = "pwm-backlight";
-		pwms = <&pwm1 0 500000>;
+		pwms = <&pwm1 0 500000 0>;
 		brightness-levels = <0 20 81 248 1000>;
 		default-brightness-level = <20>;
 		num-interpolated-steps = <21>;
···
 };
 
 &pwm1 {
-	#pwm-cells = <2>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pwm1>;
 	status = "okay";