hal: Add change to dynamically load audio config file

Add change to load audio config file at runtime from
different locations

Change-Id: I38512a5ab812f76df7c817c076044124d44f555e
diff --git a/hal/msm8974/platform.h b/hal/msm8974/platform.h
index c89fee0..88c035b 100644
--- a/hal/msm8974/platform.h
+++ b/hal/msm8974/platform.h
@@ -372,7 +372,7 @@
 #define ALL_SESSION_VSID                0xFFFFFFFF
 #define DEFAULT_MUTE_RAMP_DURATION_MS   20
 #define DEFAULT_VOLUME_RAMP_DURATION_MS 20
-#define MIXER_PATH_MAX_LENGTH 100
+#define MIXER_PATH_MAX_LENGTH 128
 #define CODEC_VERSION_MAX_LENGTH 100
 #define CODEC_VARIANT_MAX_LENGTH 100