ARM: dtsi: axp22x: add AC power supply subnode

The X-Powers AXP22X PMIC exposes the status of AC power supply.

This adds the AC power supply subnode for the AXP22X PMIC.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/axp22x.dtsi

@@ -52,6 +52,11 @@ &axp22x {
 	interrupt-controller;
 	#interrupt-cells = <1>;
 
+	ac_power_supply: ac-power-supply {
+		compatible = "x-powers,axp221-ac-power-supply";
+		status = "disabled";
+	};
+
 	regulators {
 		/* Default work frequency for buck regulators */
 		x-powers,dcdc-freq = <3000>;