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

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

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

Test-Parameters: trivial testlist=recovery-small
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I59a94c26e553a616d82ecc9a4d493511e808a82e
Reviewed-on: https://review.whamcloud.com/36441
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>