SWDEV-469422 - Avoid using of hipStream_t in internal methods (#69)

Change-Id: Ifd5362f371c846a88241927383cb95cf046548ef

[ROCm/clr commit: fb92683d86]

projects/clr/hipamd/src/hip_mempool_impl.cpp

@@ -294,7 +294,7 @@ bool MemoryPool::FreeMemory(amd::Memory* memory, Stream* stream, Event* event) {
         // Add a marker to the stream to trace availability of this memory
         Event* e = new hip::Event(0);
         if (e != nullptr) {
-          if (hipSuccess == e->addMarker(reinterpret_cast<hipStream_t>(stream), nullptr)) {
+          if (hipSuccess == e->addMarker(stream, nullptr)) {
             ts.SetEvent(e);
             // Make sure runtime sends a notification
             auto result = e->ready();