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If a CPU and GPU are xGMI connected but the GPU is hiveless with respect to other GPUs, create a new CPU-GPU hive using the GPU's PCI device location ID as the new hive ID to maintain fine grain memory access usage. Signed-off-by: Jonathan Kim <jonathan.kim@amd.com> Reviewed-by: Felix Kuehling <felix.kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>