ARM: dts: imx6q-logicpd: Fix broken PWM

The DTC doesn't like the default PWM settings, because it's expecting
three cells.  This patch reduces adds the extra entry of 0 to the PWM
reference.

Fixes:  fa28d821 ("ARM: dts: imx: default to #pwm-cells = <3> in the SoC dtsi files")
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6q-logicpd.dts

@@ -13,7 +13,7 @@ / {
 
 	backlight: backlight-lvds {
 		compatible = "pwm-backlight";
-		pwms = <&pwm3 0 20000>;
+		pwms = <&pwm3 0 20000 0>;
 		brightness-levels = <0 4 8 16 32 64 128 255>;
 		default-brightness-level = <6>;
 		power-supply = <&reg_lcd>;