audio: Add support for DSDS for incall music feature

Add support for incall-music-uplink2 usecase to enable Dual Sim
Dual Standby (DSDS) voice scenarios

Change-Id: I66947e2b505be170492d5265e91ad9cf557627cf
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index 3dbf274..4de6206 100755
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -945,6 +945,7 @@
     {TO_NAME_INDEX(USECASE_AUDIO_RECORD_AFE_PROXY)},
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_SILENCE)},
     {TO_NAME_INDEX(USECASE_INCALL_MUSIC_UPLINK)},
+    {TO_NAME_INDEX(USECASE_INCALL_MUSIC_UPLINK2)},
     {TO_NAME_INDEX(USECASE_AUDIO_A2DP_ABR_FEEDBACK)},
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_VOIP)},
     {TO_NAME_INDEX(USECASE_AUDIO_RECORD_VOIP)},