sunxi: fix network bringup on Olinuxino Micro boards
It's the A13-based Olinuxino Micro which has only wireless interfaces. The
A20-based board is a fully-fledged one which has an ethernet interface.
Signed-off-by: Zoltan HERPAI <[email protected]>
(cherry picked from commit 3ed8927cf5d7eb78d1427151cfa83bd535634d47)