rockchip: tiger-rk3588: add PCIe support

This enables PCIe support on Tiger as exposed on
Q7_PCIE[0123]_[RT]X_[PN] signals and more specifically on the `PCI
Express` connector on the Haikou devkit.

This was tested with a PCIe to NVMe adapter (e.g.
https://www.amazon.de/dp/B07RZZ3TJG).

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
1 file changed