arm64: dts: rockchip: add USB3 host to rock-5a

Enable USB3 host controller for the Radxa ROCK 5 Model A. This adds
USB3 for the lower USB3 port (the one closer to the PCB).

The upper USB3 port uses the RK3588 USB TypeC host controller, which
use a different PHY without upstream support.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20231106155934.80838-2-sebastian.reichel@collabora.com


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