apq8064-common: Remove duplicate config overlay

Change-Id: I1a15ad6f6837191a045ff76dd0c05b082181a176
apq8064-common: Select SEPERATED_HEADSET_MIC

* Voice Headset requires a different ACDB ID, so select this separate
  use case to enable it.

Change-Id: I0164f7291351d90059c7e85aa9a4693b359a17ba