ASoC: qdsp6: Add support for audio post processing effects

Add interface to support configuring equlaizer, bass boost,
virtualizer and reverb effects in DSP for tunnel mode of
playback.

Change-Id: Ie1512e340315302691327b6379a0935170dc57a7
Signed-off-by: Subhash Chandra Bose Naripeddy <snariped@codeaurora.org>
Signed-off-by: Ravi Kumar Alamanda <ralama@codeaurora.org>
Signed-off-by: flar2 <asegaert@gmail.com>