ARM: dts: sun8i-h2-plus-bananapi-m2-zero: add poweroff node

Add add devicetree information for the regulator-poweroff driver.
Signed-off-by: Michael Klein <michael@fossekall.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20201211151445.115943-4-michael@fossekall.de

arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts

@@ -86,6 +86,11 @@ reg_vcc1v2: vcc1v2 {
 		vin-supply = <&reg_vcc5v0>;
 	};
 
+	poweroff {
+		compatible = "regulator-poweroff";
+		cpu-supply = <&reg_vcc1v2>;
+	};
+
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>; /* PL7 */