LU-9019 libcfs: remove no longer use time abstraction

LU-9019 libcfs: remove no longer use time abstraction

With the cleanup from 64 bit time handling we can remove
several no longer used wrapper functions in libcfs. Also
add test to checkpatch to warn patch submitters to use
the proper linux kernel timer functions for functions
that will soon go away.

Test-Parameters: trivial

Change-Id: Ie23d74d1faea6589e7def5225321ddc52c7e65b7
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/27420
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>