audio: extend platform parser

Extend platform parser with support for additional sections.
Supported sections now include acdb ids, pcm device ids and backend names.

Change-Id: Idfbc8a8bb490606686436c107db5b0c7d636ccbe
diff --git a/hal/msm8960/platform.c b/hal/msm8960/platform.c
index 2400cd8..d83a93f 100644
--- a/hal/msm8960/platform.c
+++ b/hal/msm8960/platform.c
@@ -959,3 +959,19 @@
     return false;
 }
 
+int platform_get_usecase_index(const char * usecase __unused)
+{
+    return -ENOSYS;
+}
+
+int platform_set_usecase_pcm_id(audio_usecase_t usecase __unused, int32_t type __unused,
+                                int32_t pcm_id __unused)
+{
+    return -ENOSYS;
+}
+
+int platform_set_snd_device_backend(snd_device_t snd_device __unused,
+                                    const char * backend __unused)
+{
+    return -ENOSYS;
+}