Revert "SWDEV-492049 - Remove the handle of Phy Mem from Memobj" (#72)

This reverts commit dabe311bd8.

[ROCm/clr commit: 2259a8c01c]

projects/clr/hipamd/src/hip_mempool_impl.cpp

@@ -226,8 +226,6 @@ void* MemoryPool::AllocateMemory(size_t size, Stream* stream, void* dptr) {
     }
   } else {
     dev_ptr = memory->getSvmPtr();
-    if (!amd::MemObjMap::FindMemObj(dev_ptr))
-      amd::MemObjMap::AddMemObj(dev_ptr, memory);
   }
   // Place the allocated memory into the busy heap
   ts.AddSafeStream(stream);