ARM: sun8i: v40: add 5V regulator for Banana Pi M2 Berry

On the Banana Pi M2 Berry board, the 5V power output (used by HDMI, SATA
and USB) is controlled via a GPIO.

Add regulator node for it.
Signed-off-by: NIcenowy Zheng <icenowy@aosc.io>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun8i-v40-bananapi-m2-berry.dts

@@ -72,6 +72,15 @@
 		};
 	};
 
+	reg_vcc5v0: vcc5v0 {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc5v0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&pio 7 23 GPIO_ACTIVE_HIGH>; /* PH23 */
+		enable-active-high;
+	};
+
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&pio 6 10 GPIO_ACTIVE_LOW>; /* PG10 WIFI_EN */