hal: audio: add tz_names extn to support from audio platform_info xml

To add Speaker TZ names from audio_platform_info xml, add required
support.

Change-Id: Idd31ed9e7b7235245c3dda4ccb11b47762db5ee8
diff --git a/hal/msm8974/platform.h b/hal/msm8974/platform.h
index 6b0f13e..4b90f8b 100644
--- a/hal/msm8974/platform.h
+++ b/hal/msm8974/platform.h
@@ -396,4 +396,10 @@
     char device_name[100];
     char interface_name[100];
 };
+
+struct speaker_device_to_tz_names {
+    snd_device_t snd_device;
+    char spkr_1_tz_name[100];
+    char spkr_2_tz_name[100];
+};
 #endif // QCOM_AUDIO_PLATFORM_H