i9300: Audio updates

This is a combination of 3 commits.

audio: fix noise supression and update mixer ctls

Change-Id: I5b76be2d7d5d9754974295fce81b26498ccee391

audio: make builtin mic and back mic volumes consistent

Change-Id: I25cab57acb84a14200006e832a43676ff3c8b9d0

audio: set noise suppression based on audio parameter

Change-Id: Ie28205afda03280d9cc6437a7c98f7b995fd4f50
i9300: Cleanup
i9300: Use open-source camera again
i9300: Fix compilation
i9300: Recorded Sound is distorted and crackly.
With value "18" instead "28" we have a good audio recording.

https://jira.cyanogenmod.org/browse/CYAN-6087

Change-Id: If96018c4b19761f35000d47ec2749b8d672cfe86