arm: add CONFIG_FIX_MOVABLE_ZONE

This config option signifies that the start and size
of the movable zone has been calculated and it
must be placed precisely there.

Change-Id: Ibecda03ca69282c4efc84c642885dd47d1080ca2
Signed-off-by: Larry Bassel <lbassel@codeaurora.org>
(cherry picked from commit 6eae21afbeffe9d820bd5de47884db1e3d940b4d)

Conflicts:

	arch/arm/Kconfig