SWDEV-292547 - Fix Windows build

This addresses the warning `not all control paths return a value`.

Change-Id: Ibbb5eda9758dca5cc94c8efba9bbc6910362d6ba

hipamd/src/hip_internal.hpp

@@ -348,7 +348,7 @@ extern int ihipGetDevice();
 extern hipError_t ihipMalloc(void** ptr, size_t sizeBytes, unsigned int flags);
 extern amd::Memory* getMemoryObject(const void* ptr, size_t& offset);
 extern amd::Memory* getMemoryObjectWithOffset(const void* ptr, const size_t size);
-extern hipError_t getStreamPerThread(hipStream_t& stream);
+extern void getStreamPerThread(hipStream_t& stream);
 
 constexpr bool kOptionChangeable = true;
 constexpr bool kNewDevProg = false;

hipamd/src/hip_stream.cpp

@@ -294,7 +294,7 @@ public:
 thread_local stream_per_thread streamPerThreadObj;
 
 // ================================================================================================
-hipError_t getStreamPerThread(hipStream_t& stream) {
+void getStreamPerThread(hipStream_t& stream) {
   if (stream == hipStreamPerThread) {
     stream = streamPerThreadObj.get();
   }