ARM: tegra: fix VBUS regulator GPIO polarity in DT

Commit 4c94c8b5 "ARM: tegra: update device trees for USB binding rework"
added regulator definitions for GPIO-controlled USB VBUS. However, none
of these contained the essential DT property enable-active-high. Add
this so that the regulator definitions are correct.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/tegra20-seaboard.dts

@@ -828,6 +828,7 @@ vbus_reg: regulator@3 {
 			regulator-name = "vdd_vbus_wup1";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
+			enable-active-high;
 			gpio = <&gpio 24 0>; /* PD0 */
 		};
 	};

arch/arm/boot/dts/tegra20-trimslice.dts

@@ -410,6 +410,7 @@ vbus_reg: regulator@2 {
 			regulator-name = "usb1_vbus";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
+			enable-active-high;
 			gpio = <&gpio 170 0>; /* PV2 */
 		};
 	};

arch/arm/boot/dts/tegra20-whistler.dts

@@ -586,6 +586,7 @@ vbus1_reg: regulator@2 {
 			regulator-name = "vbus1";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
+			enable-active-high;
 			gpio = <&tca6416 0 0>; /* GPIO_PMU0 */
 		};
 
@@ -595,6 +596,7 @@ vbus3_reg: regulator@3 {
 			regulator-name = "vbus3";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
+			enable-active-high;
 			gpio = <&tca6416 1 0>; /* GPIO_PMU1 */
 		};
 	};