Fix cpuinfo related crash on ppc64 (#110708)
The "import torch" crashes with following cpuinfo error on powerpc64.
==============================================================
>>> import torch
Error in cpuinfo: processor architecture is not supported in cpuinfo
Fatal error in cpuinfo: cpuinfo_get_processors_count called before cpuinfo is initialized
Aborted (core dumped)
==================================================================
The patch fixes this by excluding powerpc from using cpuinfo as it is not supported for ppc64.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/110708
Approved by: https://github.com/ezyang