LU-6142 ldlm: Fix style issues for lustre_dlm_flags.h

LU-6142 ldlm: Fix style issues for lustre_dlm_flags.h

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

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: Icf57d55fe3806e1990d9f88d78787137171f83a3
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/53917
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>