LU-8703 libcfs: remove usless abstraction

LU-8703 libcfs: remove usless abstraction

Remove aditional abstraction of cfs_cpu_ht_nsiblings().
Replace it with direct call to original function.

Change-Id: I63fa4a197519431dcf76c66cf22328e8b4410681
Test-Parameters: trivial
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: https://review.whamcloud.com/25048
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Olaf Weber <olaf@sgi.com>