policy: hal: Force multi-channel pcm playback to deep buffer path

- When hdmi device supports multi channel PCM formats,
  framework picks compress passthrough profile as
  playback path. Avoid it by forcing routing to
  deep buffer based on system property and format type.

Change-Id: I7cca7f60a38e0d300037b0cae76d9f2c9bb0f4a1