dt-bindings: regulator: tps65218: rectify units of LS3

LS3 has a selectable current limit.
Change units to microamp in the example.
Signed-off-by: Christian Hohnstaedt <Christian.Hohnstaedt@wago.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/tps65218.txt

@@ -77,7 +77,7 @@ tps65218: tps65218@24 {
 	};
 
 	ls3: regulator-ls3 {
-		regulator-min-microvolt = <100000>;
-		regulator-max-microvolt = <1000000>;
+		regulator-min-microamp = <100000>;
+		regulator-max-microamp = <1000000>;
 	};
 };