ion: disable system contig heap

A malicious application can take advantage of the ION contig heap to
create a specific memory chunk size to exercise a rowhammer attack on the
physical hardware.
So remove support for the ION contig heap.

Change-Id: I4faa1314e7371ec6327a5d8acf2c8b39cce4be59
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
CVE-2016-6728
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
7 files changed