ARM: dts: bcm283x: Use GPIO polarity defines consistently

Currently most of the Raspberry Pi DTS have a mixture of magic
numbers and the proper GPIO polarity defines. So use the latter
one consistently.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>

arch/arm/boot/dts/bcm2835-rpi-a.dts

@@ -10,7 +10,7 @@
 
 	leds {
 		act {
-			gpios = <&gpio 16 1>;
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
 		};
 	};
 };