hal: avoid select stereo speaker during quad-mic call

During quad-mic all, recevier mic is selected in TX path.
When using stereo speaker, top speaker is near to
the mic. This causes instant feedback loop during tuning.

Fix it by using bottom speaker during quad-mic call.

Change-Id: Ie0f14356872f013fdc8b38ff41f61504b86a2553
3 files changed