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.c b/hal/msm8974/platform.c
index e354deb..0b0dd92 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -6051,9 +6051,13 @@
         ALOGV("%s:PCM", __func__);
         format = LPCM;
         break;
+    case AUDIO_FORMAT_IEC61937:
+        ALOGV("%s:IEC61937", __func__);
+        format = 0;
+        break;
     default:
         format =  -1;
-        ALOGE("%s:invalid format:%d", __func__,format);
+        ALOGE("%s:invalid format: 0x%x", __func__, audio_format);
         break;
     }
     return format;
@@ -6122,6 +6126,9 @@
     int i, ret;
     unsigned char format_id = platform_map_to_edid_format(format);
 
+    if (format == AUDIO_FORMAT_IEC61937)
+        return true;
+
     if (format_id <= 0) {
         ALOGE("%s invalid edid format mappting for :%x" ,__func__, format);
         return false;