legacy/msm7x30: Use new audio defines.

Change-Id: Ibee1c54cb42245b88725ff7f001c167da1d9f770
legacy/msm7x30: Add supported devices.

Change-Id: I8f18d99dec1102bd444f8891baa394d49aa994ce
legacy/msm7x30: Make sure to update voice volume when starting call.

Change-Id: I4f42d5d36c5d059e7877503d2ec6d0aad29778dc
legacy/msm7x30: Add support for FM radio.

Also, fix up the volume handler.

Change-Id: Id088556d0b3591dad913c4bb9e54c526ea7520ea