configs/minnowboard_max: configure eth0 through dhcp

The minnowboard max board has an ethernet port, so configure it at startup.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/minnowboard_max_defconfig

@@ -4,6 +4,7 @@ BR2_x86_atom=y
 
 # Misc
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
+BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/minnowboard-max/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/minnowboard-max/post-image.sh"