Designate the primary RK806 PMIC on the Pine64 QuartzPro64 as the system
power controller, so the board shuts down properly on poweroff(8).

Fixes: 152d3d070a9c ("arm64: dts: rockchip: Add QuartzPro64 SBC device tree")
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/c602dfb3972a0844f2a87b6245bdc5c3378c5989.1712512497.git.dsimic@manjaro.orgSigned-off-by: Heiko Stuebner <heiko@sntech.de>