arm64: dts: rockchip: add PCIe to rk3588s-indiedroid-nova

Add the necessary nodes to the Indiedroid Nova to activate the PCI
express port that is used by the RTL8111 ethernet controller.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20230918173255.1325-2-macroalpha82@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>