ARM: dts: nspire: Fix vbus_reg node to conform with DT binding

This node does not follow the DT binding schema, correct this.
All "regulator-fixed" are voltage type, so drop "regulator-type".
Should result in no functional change.
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/nspire/nspire.dtsi

@@ -71,7 +71,6 @@ vbus_reg: vbus_reg {
 		compatible = "regulator-fixed";
 
 		regulator-name = "USB VBUS output";
-		regulator-type = "voltage";
 
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;