LU-12610 target: remove OBD_ -> CFS_ macros

LU-12610 target: remove OBD_ -> CFS_ macros

Remove OBD macros that are simply redefinitions
of CFS macros.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Signed-off-by: Ben Evans <beevans@whamcloud.com>
Change-Id: I97e3f74d72d41558f293567b4609fa37aaa3b13d
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51123
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>