LU-6142 fid: Fix style issues for fid_internal.h

LU-6142 fid: Fix style issues for fid_internal.h

This patch fixes issues reported by checkpatch
for file lustre/fid/fid_internal.h

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: I73cf72c107879b341ff868b437dc36649083e2fd
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/53999
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>