x86: Convert to use driver model eth on quark/galileo

Convert to use DM version of Designware ethernet driver on Intel
quark/galileo.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/galileo_defconfig b/configs/galileo_defconfig
index d05154e..9623986 100644
--- a/configs/galileo_defconfig
+++ b/configs/galileo_defconfig
@@ -12,7 +12,7 @@
 CONFIG_CMD_BOOTSTAGE=y
 CONFIG_OF_CONTROL=y
 CONFIG_SPI_FLASH=y
-CONFIG_NETDEVICES=y
+CONFIG_DM_ETH=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_DM_PCI=y
 CONFIG_DM_RTC=y