arm: socfpga: Enable ethernet on ArriaV SoCDK

Synchronise the config options with Cyclone V SoCDK and other boards.
This enables ethernet on the ArriaV SoCDK.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/configs/socfpga_arria5_defconfig b/configs/socfpga_arria5_defconfig
index eb3bf1b..74184a0 100644
--- a/configs/socfpga_arria5_defconfig
+++ b/configs/socfpga_arria5_defconfig
@@ -9,6 +9,9 @@
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_SPI_FLASH=y
+CONFIG_DM_ETH=y
+CONFIG_NETDEVICES=y
+CONFIG_ETH_DESIGNWARE=y
 CONFIG_DM_GPIO=y
 CONFIG_DWAPB_GPIO=y
 CONFIG_SPL_DM=y