x86: Convert minnowmax to use CONFIG_DM_NET

Move to driver model for networking on minnowmax.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/intel/minnowmax/minnowmax.c b/board/intel/minnowmax/minnowmax.c
index c4f2c33..44e5bf4 100644
--- a/board/intel/minnowmax/minnowmax.c
+++ b/board/intel/minnowmax/minnowmax.c
@@ -6,7 +6,6 @@
 
 #include <common.h>
 #include <asm/gpio.h>
-#include <netdev.h>
 
 int arch_early_init_r(void)
 {
@@ -20,8 +19,3 @@
 {
 	return;
 }
-
-int board_eth_init(bd_t *bis)
-{
-	return pci_eth_init(bis);
-}
diff --git a/configs/minnowmax_defconfig b/configs/minnowmax_defconfig
index 2d9fa8c..578fcce 100644
--- a/configs/minnowmax_defconfig
+++ b/configs/minnowmax_defconfig
@@ -18,6 +18,7 @@
 CONFIG_CPU=y
 CONFIG_DM_PCI=y
 CONFIG_SPI_FLASH=y
+CONFIG_DM_ETH=y
 CONFIG_DEBUG_UART=y
 CONFIG_DEBUG_UART_BASE=0x3f8
 CONFIG_DEBUG_UART_CLOCK=1843200