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

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

This patch fixes issues reported by checkpatch
for file lnet/utils/routerstat.c

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: I679fcf0530b1ce25c00fa35c05a904d5b0a4ecb8
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55420
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>