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

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

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

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I08c038f034e26eafacc99a3f3d7966704a79709c
Reviewed-on: https://review.whamcloud.com/35904
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>