Revert "msm7x27a-common: enable legacy alsa audio"

This reverts commit 6bff98be0b675ac2782672995b65113ee51af9d6.
Revert "alsa_sound: Fix to sound burst on switching from speaker to headset"

This reverts commit 9fc6622efacd77bb730a70b4e39086c27757ed85.
Revert "audio: Choose Speaker instead of USB Headset on force use"

This reverts commit 3407451cea76bd5dd20c3343d55c51e848b3de37.
Revert "alsa_sound: Add wifi display to fixed volume devices"

This reverts commit 06da05e8272a28a163b58f2c5ebf12792e470e4d.
Revert "alsa_sound: Add support for Voip"

This reverts commit 7d5662348a05a9e1a2a8999f013538e66b4c9f21.
Revert "msm7x27a-common: update audio_policy.conf"

This reverts commit c9bdef947f7186e31ce37ca79687e6e46391b50d.