RK3588j uses a different set of OPPs for its GPU, both in terms of
allowed frequencies and in terms of voltages.

Move the GPU OPPs table into per-variant .dtsi files to accommodate
for this difference.

The table for RK3588j is adapted from Rockchip downstream sources [1],
while RK3588 one is moved verbatim into the per-variant .dtsi file.
The values provided for RK3588 in the downstream sources match those
in the original commit.

[1] https://github.com/rockchip-linux/kernel/blob/604cec4004abe5a96c734f2fab7b74809d2d742f/arch/arm64/boot/dts/rockchip/rk3588s.dtsi

Fixes: 6fca4edb ("arm64: dts: rockchip: Add rk3588 GPU node")
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Link: https://lore.kernel.org/r/20240617-rk-dts-additions-v5-8-c1f5f3267f1e@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>