audio: Adjust voice-speaker volumes to the original values

Lower in-call mic a bit, as well as the non-voice speaker,
and disable micbias for DMIC-EF

Change-Id: I377b12ff32284bc97b5df99b700d7df07ea4326e
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_device_lge_e975 into kk4.4