hal: Add missing PCM device IDs

Add low-latency playback and speaker calibration use cases to
appropriate XML files and platform.c to enable overwriting
hardcoded pcm device IDs with XML values.

CRs-fixed: 1019857
Change-Id: I25fd84b12619bf89319d62257f1ab44567d5382a
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index fe7e1c1..49e8b5e 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -698,6 +698,8 @@
     {TO_NAME_INDEX(USECASE_AUDIO_HFP_SCO)},
     {TO_NAME_INDEX(USECASE_AUDIO_PLAYBACK_FM)},
     {TO_NAME_INDEX(USECASE_AUDIO_RECORD_FM_VIRTUAL)},
+    {TO_NAME_INDEX(USECASE_AUDIO_SPKR_CALIB_RX)},
+    {TO_NAME_INDEX(USECASE_AUDIO_SPKR_CALIB_TX)},
 };
 
 #define NO_COLS 2