uboot-imx

arm: mvebu: Remove leftover Makefile

This Makefile was not used since quite some time. I only missed to
remove it in the move to mach-mvebu. So lets remove it now so
that the mvebu-common directory is really removed completely.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>