msm8974: disable hardware AAC encoding for now

Not yet sure what really breaks it, but this fixes a lot of apps that expect AAC encoding, including front camera video.
Might be worth putting in place for now, until the real issue is solved.

Change-Id: I12765acebacd0d2ff61ba74866f75d17d0cecd01
msm8974: Remove extra resampler

 * We do not need this with the floating point mixer.

Change-Id: Ibb97bd56374d24996561b8825d8ab4c765a36099