ARM: dts: rockchip: Switch to operating-points-v2 for RK3128's CPU

This will allow frequency-scaling for the cpu-cores.
Operating frequencies and voltages have been taken from Rockchip's
downstream kernel.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Link: https://lore.kernel.org/r/20230829214004.314932-10-knaerzche@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>