msm8974: Add debug logging services

 * Disabled by default, just adding for convenience when
   needed for debugging.

Change-Id: I56ac0247eb6520efcaa60eb8873049b0e18a5161
Revert "msm8974: Offload all the things!"

 * Yeah, there are problems with this. Some games are ending up in the
   compress path and doing seeks which freak out the DSP.

This reverts commit 6a900e271fda2bb34b9ada95215e4d2de3e974d8.

Change-Id: I9e7413c3072e91815ab9681a32eb4484c7d48eac