arm: add support for ARCH_POPULATES_NODE_MAP

ARCH_POPULATES_NODE_MAP is used by most of the other
architectures and allows finer-grained control of
how and where zones are placed.

Signed-off-by: Larry Bassel <lbassel@codeaurora.org>

Conflicts:

	arch/arm/mm/init.c
(cherry picked from commit d4e809ea8cca0ae779706dd17a2d36af26efadca)

Conflicts:

	arch/arm/Kconfig

Change-Id: I3dfc842731d3cb2c224ef6a2c4b72074b14f0384