m7-common: re-organize and clean-up snd_soc_msm

Remove duplicate sections: ANC Headset
Remove device-specific verbs/modifiers which duplicate the base verb/modifier
Remove unused devices: HAC Handset, SecondMic
Alphabetize within verbs, devices, and modifiers
Remove CapturePCM from playback-only verbs/modifiers
Uniform formatting throughout

Change-Id: I34b21aae87a467ecc131c5c8f7da80a17acbfddd