hal: Add support for adaptive bitrate

Add support for adaptive bitrate with A2DP Offload.
Changes include separate sample rate for Slimbus Rx and
Tx backend, Tx feedback path setup on SLIMBUS_7_TX from
BTSoC to LPASS, AFE port configuration for A2DP encoder
and decoder.

Change-Id: I3b339e5525c9b6dab2e83f50bb4d63cd5d73850e
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index 80f664b..237fddb 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -884,6 +884,7 @@
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_AFE_PROXY)},
     {TO_NAME_INDEX(USECASE_AUDIO_RECORD_AFE_PROXY)},
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_SILENCE)},
+    {TO_NAME_INDEX(USECASE_AUDIO_A2DP_ABR_FEEDBACK)},
 };
 
 #define NO_COLS 2