arm64: dts: rockchip: add regulators for PCIe on RK3399 Puma Haikou

arm64: dts: rockchip: add regulators for PCIe on RK3399 Puma Haikou

The PCIe PHY requires two regulators and are present on the SoM
directly, while the PCIe connector also exposes 3V3 and 12V power rails
which are available on the baseboard.

Considering that 3/4 regulators are always-on on HW level and that the
last one depends on a regulator from the PMIC that is specified as
always on, this commit should be purely cosmetic and no change in
behavior is expected.

Let's add all regulators for PCIe on RK3399 Puma Haikou.

Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Link: https://lore.kernel.org/r/20240308-puma-diode-pu-v2-3-309f83da110a@theobroma-systems.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>