LU-12610 cfs: add unlikely to CFS_ macros

LU-12610 cfs: add unlikely to CFS_ macros

Fix the (hopefully) last few OBD_ users to use
CFS_ macros instead.

Add an 'unlikely()' to CFS_ macros. Some of the
OBD_ macros included this hint. Once those macros
are removed, the hint will be lost. Add it to the
CFS_ macros instead.

The libcfs_fail.h only has a couple style issues
left. Just fix them in this patch.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Ie06533b8b408cacf6f6fe2d29a1a8e727ca4280b
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51291
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>