zeus: reduce pmems to reclaim some more RAM, eliminate audio_pmem since it's not being used

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I9e44cf321b3de079fbb7d0fdbecb9c40de3b8789
Signed-off-by: garwedgess <garethwilliams21@gmail.com>