ARM: dt: tegra trimslice: enable USB2 port

This was accidentally disabled by commit 2a5fdc9 "ARM: dt: tegra:
invert status=disable vs status=okay".

Cc: <stable@vger.kernel.org> # v3.5 (file is named tegra-trimslice.dts there)
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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

@@ -280,6 +280,7 @@
 	};
 
 	usb@c5004000 {
+		status = "okay";
 		nvidia,phy-reset-gpio = <&gpio 168 0>; /* gpio PV0 */
 	};