staging: lustre: lov: Add a space before open braces '{' in lov_request.c

Fix the following checkpatch.pl issue in lov_request.c:
ERROR: space required before the open brace '{'

Signed-off-by: Riccardo Lucchese <riccardo.lucchese@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>