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
Revert "semaphore: Remove mutex emulation"

This reverts commit 4882720b267b7b1d1b0ce08334b205f0329d4615.
zeus: board changes for camera

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

Change-Id: Iaccacd4d9d11fe7a845a654079d901b119443dba
max17040: fix build error

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

Change-Id: I39a786a2eb4271ca81c33a2bed7f53c3b70fdc94