MPC85xx: remove broken "mpq101" board

The board stopped building some time ago, and the board maintainer
agrtees to drop it - see
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/112674



Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kumar Gala <galak@kernel.crashing.org>