ARM: da850evm_nand: Enable Ethernet

The NAND configuration has had the ethernet missing, so this patch
enables the on-board ethernet interface.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/da850evm_nand_defconfig b/configs/da850evm_nand_defconfig
index 5966a88..7010939 100644
--- a/configs/da850evm_nand_defconfig
+++ b/configs/da850evm_nand_defconfig
@@ -64,6 +64,8 @@
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SPI_FLASH_MTD=y
 CONFIG_DM_ETH=y
+CONFIG_MII=y
+CONFIG_DRIVER_TI_EMAC=y
 CONFIG_PHY=y
 CONFIG_PHY_DA8XX_USB=y
 CONFIG_PINCTRL=y