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H A Dspapr.cdb5127b2 Thu Sep 05 23:48:28 CDT 2019 David Gibson <david@gibson.dropbear.id.au> spapr: Move handling of special NVLink numa node from reset to init

The number of NUMA nodes in the system is fixed from the command line.
Therefore, there's no need to recalculate it at reset time, and we can
determine the special gpu_numa_id value used for NVLink2 devices at init
time.

This simplifies the reset path a bit which will make further improvements
easier.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>