ARM: dts: stm32: Use gpio bindings in stm32f469-disco

Use gpio bindings for vcc5v_otg.
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32f469-disco.dts

@@ -112,7 +112,7 @@ button@0 {
 	vcc5v_otg: vcc5v-otg-regulator {
 		compatible = "regulator-fixed";
 		enable-active-high;
-		gpio = <&gpiob 2 0>;
+		gpio = <&gpiob 2 GPIO_ACTIVE_HIGH>;
 		regulator-name = "vcc5_host1";
 		regulator-always-on;
 	};