hal: Fix CFI errors

CFI check is failing due to difference in
function signature during CVE-2019-10581
POC test. Fix the issue by matching the
function signature in header file and
function pointer type.

Change-Id: I92ccb0871b09f5757195844984519d51367ed35f
diff --git a/hal/acdb.h b/hal/acdb.h
index 4db8c60..750c9cf 100644
--- a/hal/acdb.h
+++ b/hal/acdb.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2021, The Linux Foundation. All rights reserved.
  * Not a Contribution.
  *
  * Copyright (C) 2013 The Android Open Source Project
@@ -47,7 +47,7 @@
 
 struct mixer;
 /* Audio calibration related functions */
-typedef void (*acdb_deallocate_t)();
+typedef void (*acdb_deallocate_t)(void);
 typedef int  (*acdb_init_t)();
 typedef int  (*acdb_init_v2_t)(const char *, char *, int);
 typedef int  (*acdb_init_v3_t)(const char *, char *, struct listnode *);