--- zzzz-none-000/linux-4.4.60/drivers/net/ethernet/Kconfig	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/drivers/net/ethernet/Kconfig	2018-11-08 13:36:17.000000000 +0000
@@ -13,6 +13,7 @@
 
 config MDIO
 	tristate
+	default y
 
 config SUNGEM_PHY
 	tristate