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
	arch/arm/mm/init.c

Change-Id: I9dd848a87790268f7ad6dd49242fe65207fff90c