ARM: dts: rockchip: add operating-points-v2 for cpu on rk322x

This patch adds a new opp table for cpu on rk322x SoC.

Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>