LU-6142 osp: Fix style issues for lu_object.h

LU-6142 osp: Fix style issues for lu_object.h

This patch fixes issues reported by checkpatch
for file lustre/include/lu_object.h

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: Ia16c0c56e92103ef172c422f45d646d2e27b7f6a
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/53952
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>