arm: multi_v7_defconfig: Tweaks for omap and sunxi

OMAP recently changed how the platforms are configured, so OMAP2/3/4 SoC
support is no longer enabled by default. Add them back.

Enable new ethernet driver for sunxi.

The i.MX console options moved due to resorting, no functional change.

Signed-off-by: Olof Johansson <olof@lixom.net>