Revert "voltage changes as usual"

This reverts commit 68230389852252ab8cf08c91bb670bf668f4040a.
Revert "d2: Raise ION_MM_SIZE"

This reverts commit 2a085e985b91f501a2be7ba2736ff66810622ed0.
d2 et al.: disable OABI compat

Commit fefc65c201fc50bd4f22602292bbf48c8df23450 removed the requirement
for OABI compatibility back in April due to TLB crashes, but we still
have it on.

There is no reason I can think of to leave this on.

Change-Id: Idec3a3f4a931db601ad469e892b30eb18be4deed