m7-common: camera: clean up wrapper code

* Clean up formatting, warnings, style, etc.

Change-Id: Ie0757befa341e209e2b552b42bffee6b52d8df0a
m7-common: remove duplicated sound device

Change-Id: I6ddd09ed36eabf81390d028a5277a743ed5dffd8
snd_soc_msm: fix some low latency use cases

Change-Id: Ib8737ab3a9885cfb8ad618d6732c38139dd1ef51
dlx: snd_soc_msm device adjustments

Referenced changes from http://review.cyanogenmod.org/52756

Device:
Voice Speaker: these sequences belong in verbs/modifiers
Camcorder TX: we don't have four mic channels, get the enable disable
  sequence from Line LandscapeCam
Voice Line, Speaker DMIC Endfire: use integer volumes

Change-Id: I5598be418f4f346551e885276b812523cca2dde3