gpu: ion: Switch MM heap to use CMA on DT targets

The MM heap is now dedicated for secure use cases.
Switch it over to use CMA for allocations instead of
the carveout heaps.

Change-Id: Ic110f3b34b3b1280efd3d6784a9242dcf8c627c2
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
3 files changed