hal: clean up redudant code

External speaker/handset specific backend tags, acdb ids and
PCM device ids for Nexus 6 are now configured using
audio_platform_info.xml file. Remove the hardcoding in the HAL.

Bug: 22100304

Change-Id: I127a1a30333361fb794e9d5abee518c2dc3b4583
2 files changed
tree: 07d8fe5d203778dbb01d536e62ab83e57ad47482
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk