LU-6142 tests: Fix style issues for checkstat.c

LU-6142 tests: Fix style issues for checkstat.c

This patch fixes issues reported by checkpatch
for file lustre/tests/checkstat.c

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I2ed9c9b4325f9285643a21114dbaf2e1e48c1757
Reviewed-on: https://review.whamcloud.com/35814
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>