sdm: Add support for multiple tone map sessions

Add support for multiple tone map sessions for HDR feature.

CRs-Fixed: 1104823
Change-Id: I6039cf4fac85195c75bcc8762bcbcd0ede8b196a
diff --git a/sdm/include/utils/utils.h b/sdm/include/utils/utils.h
index 5f621dd..ed2c6ae 100644
--- a/sdm/include/utils/utils.h
+++ b/sdm/include/utils/utils.h
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+* Copyright (c) 2016 - 2017, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
@@ -34,6 +34,7 @@
 
 float gcd(float a, float b);
 float lcm(float a, float b);
+void CloseFd(int *fd);
 
 }  // namespace sdm