arm64: dts: rockchip: add USB2 support for rk3588

This adds USB2 (EHCI & OHCI) ports including the related PHYs
and GRF modules to the rk3588(s) device tree.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230712165106.65603-2-sebastian.reichel@collabora.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>