The binding dictates using 3 pwm-cells. Adhere to that.
This fixes the following dtbs_check warnings:
	arch/arm/boot/dts/nxp/imx/imx6sx-softing-vining-2000.dtb: pwm@
2080000: #pwm-cells:0:0: 3 was expected
		from schema : http://devicetree.org/schemas/pwm/imx-pwm.yaml#
	arch/arm/boot/dts/nxp/imx/imx6sx-softing-vining-2000.dtb: pwm@
2084000: #pwm-cells:0:0: 3 was expected
		from schema : http://devicetree.org/schemas/pwm/imx-pwm.yaml#
	arch/arm/boot/dts/nxp/imx/imx6sx-softing-vining-2000.dtb: pwm@
22a8000: #pwm-cells:0:0: 3 was expected
		from schema : http://devicetree.org/schemas/pwm/imx-pwm.yaml#
There is no need for an explicit status = "okay" in the pwm nodes as
the soc dtsi doesn't disable these devices. Drop these properties, too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
                led-1 {
                        label = "red";
                        max-brightness = <255>;
-                       pwms = <&pwm6 0 50000>;
+                       pwms = <&pwm6 0 50000 0>;
                };
 
                led-2 {
                        label = "green";
                        max-brightness = <255>;
-                       pwms = <&pwm2 0 50000>;
+                       pwms = <&pwm2 0 50000 0>;
                };
 
                led-3 {
                        label = "blue";
                        max-brightness = <255>;
-                       pwms = <&pwm1 0 50000>;
+                       pwms = <&pwm1 0 50000 0>;
                };
        };
 };
 };
 
 &pwm1 {
-       #pwm-cells = <2>;
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_pwm1>;
-       status = "okay";
 };
 
 &pwm2 {
-       #pwm-cells = <2>;
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_pwm2>;
-       status = "okay";
 };
 
 &pwm6 {
-       #pwm-cells = <2>;
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_pwm6>;
-       status = "okay";
 };
 
 ®_arm {