arm64: dts: rockchip: Fix RX delay for ethernet phy on rk3588s-rock5a

Add network PHY rx delay and change type to rgmii, so
that it is applied. This fixes packet loss when more
than a few packets are exchanged.

Fixes: d1824cf9 ("arm64: dts: rockchip: Add rock-5a board")
Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
Link: https://lore.kernel.org/r/20230113130220.662194-1-lucas.tanure@collabora.com


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