Add support for exporting portable handles to GPU allocations.

Adds hsa_amd_portable_export_dmabuf and hsa_amd_portable_close_dmabuf
which allow obtaining dmabuf handles to rocr allocations.  These handles
may be shared with other APIs to support cross vendor & cross device
memory sharing.
Adds query to return whether dmabuf export is supported

Signed-off-by: Jonathan Kim <Jonathan.Kim@amd.com>
Signed-off-by: David Yat Sin <David.YatSin@amd.com>

Change-Id: I7f98501087d9563d07fc2cb428cc886b1e518b1e


[ROCm/ROCR-Runtime commit: 42243c1e8f]

projects/rocr-runtime/runtime/hsa-runtime/core/common/hsa_table_interface.cpp

@@ -1212,6 +1212,17 @@ hsa_status_t HSA_API hsa_amd_spm_set_dest_buffer(hsa_agent_t agent, size_t size,
                                                      is_data_loss);
 }
 
+// Mirrors Amd Extension Apis
+hsa_status_t HSA_API hsa_amd_portable_export_dmabuf(const void* ptr, size_t size, int* dmabuf,
+                                                    uint64_t* offset) {
+  return amdExtTable->hsa_amd_portable_export_dmabuf_fn(ptr, size, dmabuf, offset);
+}
+
+// Mirrors Amd Extension Apis
+hsa_status_t HSA_API hsa_amd_portable_close_dmabuf(int dmabuf) {
+  return amdExtTable->hsa_amd_portable_close_dmabuf_fn(dmabuf);
+}
+
 // Tools only table interfaces.
 namespace rocr {