configs: rockchip: Enable ethernet driver on RK356x boards

Enable DWC_ETH_QOS_ROCKCHIP and related PHY driver on RK356x boards that
have an enabled gmac node.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/nanopi-r5s-rk3568_defconfig b/configs/nanopi-r5s-rk3568_defconfig
index c278ce0..2736d38 100644
--- a/configs/nanopi-r5s-rk3568_defconfig
+++ b/configs/nanopi-r5s-rk3568_defconfig
@@ -65,6 +65,9 @@
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_ROCKCHIP=y
+CONFIG_PHY_REALTEK=y
+CONFIG_DWC_ETH_QOS=y
+CONFIG_DWC_ETH_QOS_ROCKCHIP=y
 CONFIG_RTL8169=y
 CONFIG_NVME_PCI=y
 CONFIG_PCIE_DW_ROCKCHIP=y