hal: Invoke acdb deallocate api

Invoke acdb deallocate api during audiohal
unload process.

Change-Id: I0d59bf20147481c2d46814c9381cfb8a2992e190
diff --git a/hal/msm8916/platform.c b/hal/msm8916/platform.c
index 76b339b..6e327f2 100644
--- a/hal/msm8916/platform.c
+++ b/hal/msm8916/platform.c
@@ -2833,6 +2833,9 @@
     /* free acdb_meta_key_list */
     platform_release_acdb_metainfo_key(platform);
 
+    if (my_data->acdb_deallocate)
+        my_data->acdb_deallocate();
+
     free(platform);
     /* deinit usb */
     audio_extn_usb_deinit();