arm: add support for DONT_MAP_HOLE_AFTER_MEMBANK0

Some platforms have memory at the top of the
first memory bank which the kernel cannot
access. Mapping this is unnecessary and wastes
precious virtual space.

Change-Id: I20be40a17c5d80d889b0903f11fa0fe1b3190e7a
Signed-off-by: Larry Bassel <lbassel@codeaurora.org>
(cherry picked from commit fe101112b8354688c509ce7474ea88ff6ed86bef)

Conflicts:

	arch/arm/mach-msm/include/mach/memory.h