Revert "hammerhead: Enable deep buffer output as primary"

Confirmed to disrupt low-latency audio, we don't have supporting code for this (yet), and it's breaking webRTC (hangouts, in particular)

This reverts commit ec82381a55f1588fc0068eebe916ee3e5ad6a4f4.

Change-Id: I842f2da5f0c1c4d332efa7f82d2d9d256a6ee5cc