LU-9575 obdclass: remove cl_for_each defines

LU-9575 obdclass: remove cl_for_each defines

cl_for_each and cl_for_each_reverse are simply aliases
for list_for_each_entry and list_for_each_entry_reverse
There is no point to them so just get rid of them and
eliminate any confusion.

Signed-off-by: Ben Evans <bevans@cray.com>
Change-Id: I4f21cc5020142c82999324f0ae7ccb57704a98bd
Reviewed-on: https://review.whamcloud.com/27385
Tested-by: Jenkins
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>