arm64: dts: rockchip: Remove system-power-controller from pmic on Odroid Go Advance

This fixes a poweroff issue when this is supposed to happen
via PSCI.
Signed-off-by: Maciej Matuszczyk <maccraft123mc@gmail.com>
Link: https://lore.kernel.org/r/20201023181629.119727-1-maccraft123mc@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts

@@ -243,7 +243,6 @@ rk817: pmic@20 {
 		interrupts = <RK_PB2 IRQ_TYPE_LEVEL_LOW>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pmic_int>;
-		rockchip,system-power-controller;
 		wakeup-source;
 		#clock-cells = <1>;
 		clock-output-names = "rk808-clkout1", "xin32k";