arm64: dts: rockchip: drop separate opp table on rk3399-puma

We're using OPPs with a range now, so the fact that the cpu regulator
on puma can't provide the needed 5mV steps requested in the minimal
voltage values can be handled automatically by the opp framework.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Link: https://lore.kernel.org/r/20210225133322.3420724-3-heiko@sntech.de


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