LU-6245 libcfs: remove wrappers for timer functions

LU-6245 libcfs: remove wrappers for timer functions

Use the linux timer_list api directly instead of going
throught a abstraction layer in libcfs.

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Change-Id: Ida47b2746e68b7428cbc30b40fbdc8810b7d05f7
Reviewed-on: https://review.whamcloud.com/23733
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>