audio: remove legacy lpa code & change lpa buffer size

Change-Id: Ia6e1b2ca20d3fb5b4cd902f43bec9b34004f236f
audio/msm7627a: Enable support for LPA/Tunnel audio playback

Change-Id: I12edbf103fe3a5a81451d2b4242bf77342b64ff9
alsa_sound: Add support for Voip

-Add Voip input device to support tx path. Also correct
check in close output to handle multiple voip rx streams that use
same direct output.

Change-Id: I24536e47d0d820bec99d7e886acd3aac0153174d