buildroot

board/minnowboard: remove support for minnowboard

The scripts used for the minnowboards were generic for MinnowBoard and
MinnowBoard MAX. Since we removed the original MinnowBoard, this isn't
necessary anymore.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>