configs: Finish migration of PHY_GIGE

Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/tb100_defconfig b/configs/tb100_defconfig
index 011c876..5b3c84b 100644
--- a/configs/tb100_defconfig
+++ b/configs/tb100_defconfig
@@ -15,6 +15,7 @@
 CONFIG_OF_EMBED=y
 CONFIG_DM=y
 CONFIG_NETDEVICES=y
+CONFIG_PHY_GIGE=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y