asoc: dsp: Add support for adaptive bitrate

Add support for adaptive bitrate with A2DP offload.
Set up Tx feedback path on SLIMBUS_7_TX from BT SoC
to LPASS. Configure AFE encoder and decoder for ABR.
Add bit width support to configure AFE port with
32bit for BT A2DP.

Change-Id: I8e0afaf52561e5dc70318240ba238fc42844501f
Signed-off-by: Aniket Kumar Lata <alata@codeaurora.org>