msm: ocmem: Add support for tail growth.

Add support for an OCMEM Zone to grow from the tail to
allow maximum sharing among subsystems.

A zone growing from tail has subsequent allocations that
start at lower addresses compared to an initial allocation.

Change-Id: Ibdd65c49bc7e3ff3a5398b6851828587de257e0a
Signed-off-by: Naveen Ramaraj <nramaraj@codeaurora.org>
3 files changed