LU-6142 utils: Fix style issues for llog_reader.c

LU-6142 utils: Fix style issues for llog_reader.c

This patch fixes issues reported by checkpatch
for file lustre/utils/llog_reader.c

Lustre-change: https://review.whamcloud.com/38706
Lustre-commit: 6e159dceb61829ff790d7245309ecf0cfdf70cb6

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I02af3385be5521ef5ed9063926e846059067b8ab
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Ben Evans <beevans@whamcloud.com>
Reviewed-by: Petros Koutoupis <petros.koutoupis@hpe.com>
Signed-off-by: Etienne AUJAMES <eaujames@ddn.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48304
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>