msm: fix circular dependency warning when ENABLE_DMM is set

When ENABLE_DMM was set, it caused a warning about
a circular dependency with MEMORY_HOTPLUG to be emitted.

Fix this by making all DMM config options depend on ENABLE_DMM (only)
and not having ENABLE_DMM depend on anything.

Change-Id: I1c0faf92163d49dca38fb2895be68eac21e7d38a
Signed-off-by: Larry Bassel <lbassel@codeaurora.org>
(cherry picked from commit e509155d9bf38f5225f2ded0485efddaf671d4e1)

Conflicts:

	arch/arm/Kconfig