ARM: dts: sun6i: hummingbird: Enable AXP221 DC5LDO regulator as "vdd-cpus"

The DC5LDO regulator supplies VDD-CPUS, which is for the embedded
controller in the A31 SoC.

Signed-off-by: Chen-Yu Tsai <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>

arch/arm/boot/dts/sun6i-a31-hummingbird.dts

···
 	regulator-name = "avcc";
 };
 
+&reg_dc5ldo {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <1320000>;
+	regulator-name = "vdd-cpus";
+};
+
 &reg_dcdc1 {
 	regulator-always-on;
 	regulator-min-microvolt = <3000000>;