The change enables VM support in graphs on Windows. That allows
to avoid caching of all allocations at the cost of map/unmap
overhead during memory create/destroy.
Change-Id: I792be00fba099e5e5d3cd44a963e1dfd6976a86d
Implements hipMemRetainAllocationHandle
HIP layer updates the svmPtr of the amd::memory
ROCCLR just manages the MemObjMap
This is because HIP knows the orignal (generic) address of the
physical memory whereas ROCCLR doesn't keep track of that
Change-Id: Ied26d7f814bc468f5cf586c967020737b9aa9e9f