ARM: at91/dt: kizbox: fix mismatch LED PWM device

The network_red LED uses the 4th PWM device.
Signed-off-by: NGaël PORTAY <g.portay@overkiz.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91-kizbox.dts

@@ -126,7 +126,7 @@
 
 		network_red {
 			label = "pwm:red:network";
-			pwms = <&tcb_pwm 3 10000000 PWM_POLARITY_INVERTED>;
+			pwms = <&tcb_pwm 4 10000000 PWM_POLARITY_INVERTED>;
 			max-brightness = <255>;
 			linux,default-trigger = "default-on";
 		};