hal: Add support for IEC61937 HDMI pass-through

Add IEC61937 format for apq8098 compress pass-through.

Change-Id: I958509a7f7ab856092756e91e5e7f2eefeb70809
diff --git a/hal/msm8974/platform.h b/hal/msm8974/platform.h
index b4dcfe3..ae50ce7 100644
--- a/hal/msm8974/platform.h
+++ b/hal/msm8974/platform.h
@@ -494,7 +494,10 @@
     LEGACY_PCM = 0,
     PASSTHROUGH,
     PASSTHROUGH_CONVERT,
-    PASSTHROUGH_DSD
+    PASSTHROUGH_DSD,
+    LISTEN,
+    PASSTHROUGH_GEN,
+    PASSTHROUGH_IEC61937
 };
 /*
  * ID for setting mute and lateny on the device side