ARM: sun7i: a20: cubieboard2: Enable AXP209's ACIN power supply

The ACIN pins of the AXP209 PMIC on the Cubieboard 2 are tied to the
DC jack on the board.

Enable the ACIN power supply.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun7i-a20-cubieboard2.dts

@@ -176,6 +176,10 @@ &reg_ahci_5v {
 
 #include "axp209.dtsi"
 
+&ac_power_supply {
+	status = "okay";
+};
+
 &reg_dcdc2 {
 	regulator-always-on;
 	regulator-min-microvolt = <1000000>;