Current usertools/cpu_layout.py is broken to handle multithreads
of count more than 2 as in IBM powerpc P8 servers.
Below patch addressed this issue.
Also, added minor exception catch on failing to open unavailable
sys file in case of multithread=off configuration in server.
Patch has been verified not to break existing topology configurations
and also not changing anything in current output.
Signed-off-by: Gowrishankar Muthukrishnan <gowrishankar.m@linux.vnet.ibm.com>
Reviewed-by: Andriy Berestovskyy <andriy.berestovskyy@caviumnetworks.com>
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