configs: rockchip: Enable ethernet driver on RK3588 boards

Enable DWC_ETH_QOS_ROCKCHIP and related PHY driver on RK3588 boards that
have an enabled gmac node and drop ETH_DESIGNWARE and GMAC_ROCKCHIP for
remaining RK3588 boards.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>