x86: qemu: Convert to use driver model eth

Move to driver model for ETH (e1000) on QEMU.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig
index 7d814d8..366ccc4 100644
--- a/configs/qemu-x86_defconfig
+++ b/configs/qemu-x86_defconfig
@@ -15,7 +15,7 @@
 CONFIG_OF_CONTROL=y
 CONFIG_CPU=y
 CONFIG_SPI_FLASH=y
-CONFIG_NETDEVICES=y
+CONFIG_DM_ETH=y
 CONFIG_E1000=y
 CONFIG_DM_PCI=y
 CONFIG_DM_RTC=y