Add simple driver which allows to configure the memory controller trust
zones. It is responsible for opening mc trustzone window, with
appropriate base address, size and attributes.

Example of usage in upcoming commits.

Change-Id: I8bea17754d31451b305040ee7de331fb8db0c63f
Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>