ARM: dts: bcm283x: Increase pwm-cells

The pwm-bcm2835 supports PWM polarity, so adjust the affected dtsi
files accordingly and fix the dtbs_check warning:

pwm@7e20c000: #pwm-cells:0:0: 3 was expected

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230617133620.53129-6-stefan.wahren@i2se.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Author: Stefan Wahren

arch/arm/boot/dts/broadcom/bcm2711.dtsi

@@ -278,7 +278,7 @@
 			clocks = <&clocks BCM2835_CLOCK_PWM>;
 			assigned-clocks = <&clocks BCM2835_CLOCK_PWM>;
 			assigned-clock-rates = <10000000>;
-			#pwm-cells = <2>;
+			#pwm-cells = <3>;
 			status = "disabled";
 		};
 

arch/arm/boot/dts/broadcom/bcm283x.dtsi

@@ -416,7 +416,7 @@
 			clocks = <&clocks BCM2835_CLOCK_PWM>;
 			assigned-clocks = <&clocks BCM2835_CLOCK_PWM>;
 			assigned-clock-rates = <10000000>;
-			#pwm-cells = <2>;
+			#pwm-cells = <3>;
 			status = "disabled";
 		};