arm64: dts: rockchip: RK3588s: Enable PCIE2.0x1 @fe190000

Enable PCIE2.0x1 @fe190000 for RTL8125 network controller in
Rock 5B board.

This is based on prior work from XiaoDong Huang and
Peter Geis fixing this issue specifically for Rockchip 356x.

Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
Change-Id: Ib01a1a49234167932ea89c8ac5f830e4385ecf75