ARM: dts: meson: minix-neo-x8: define PMIC as power controller

The PMIC driver used to register itself as poweroff controller by
default, hence assuming that this device is using the PMIC as
system power controller.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Reviewed-by: NMarcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: NCarlo Caione <carlo@endlessm.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

arch/arm/boot/dts/meson8-minix-neo-x8.dts

@@ -80,6 +80,7 @@
 	pmic@32 {
 		compatible = "ricoh,rn5t618";
 		reg = <0x32>;
+		system-power-controller;
 
 		regulators {
 		};