WIP added modular feature for device apis

src/staging_buffer.cpp

@@ -1,8 +1,5 @@
-#include <hc_am.hpp>
-
-#include "hsa_ext_amd.h"
-
 #include "hcc_detail/staging_buffer.h"
+#include "hcc_detail/hip_util.h"
 
 #ifdef HIP_HCC
 #define THROW_ERROR(e) throw ihipException(e)