ARM: tegra: fix VBUS regulator GPIO polarity in DT

Commit 4c94c8b "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>
diff --git a/arch/arm/boot/dts/tegra20-seaboard.dts b/arch/arm/boot/dts/tegra20-seaboard.dts
index ab177b4..365760b 100644
--- a/arch/arm/boot/dts/tegra20-seaboard.dts
+++ b/arch/arm/boot/dts/tegra20-seaboard.dts
@@ -828,6 +828,7 @@
 			regulator-name = "vdd_vbus_wup1";
 			regulator-min-microvolt = <5000000>;
 			regulator-max-microvolt = <5000000>;
+			enable-active-high;
 			gpio = <&gpio 24 0>; /* PD0 */
 		};
 	};