ARM: dts: Use defined GPIO constants in flags cell for OMAP2+ boards

Many OMAP2+ DTS are not using the defined constants to express
the GPIO polarity. Replace these so the DTS are easier to read.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/boot/dts/omap3-beagle.dts b/arch/arm/boot/dts/omap3-beagle.dts
index 67659a0..274c2c4 100644
--- a/arch/arm/boot/dts/omap3-beagle.dts
+++ b/arch/arm/boot/dts/omap3-beagle.dts
@@ -55,7 +55,7 @@
 		regulator-name = "hsusb2_vbus";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
-		gpio = <&twl_gpio 18 0>;	/* GPIO LEDA */
+		gpio = <&twl_gpio 18 GPIO_ACTIVE_HIGH>;	/* GPIO LEDA */
 		startup-delay-us = <70000>;
 	};