riscv: dts: starfive: add regulator device

Add the axp15060 regulator device. OpenSBI uses this device to perform
board reset and shutdown.

Signed-off-by: Nam Cao <namcao@linutronix.de>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/arch/riscv/dts/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/dts/jh7110-starfive-visionfive-2.dtsi
index e94f9fe..f2c6bec 100644
--- a/arch/riscv/dts/jh7110-starfive-visionfive-2.dtsi
+++ b/arch/riscv/dts/jh7110-starfive-visionfive-2.dtsi
@@ -127,6 +127,11 @@
 	pinctrl-0 = <&i2c5_pins>;
 	status = "okay";
 
+	pmic@36 {
+		compatible = "x-powers,axp15060";
+		reg = <0x36>;
+	};
+
 	eeprom@50 {
 		compatible = "atmel,24c04";
 		reg = <0x50>;