staging: lustre: Fix checkpatch.pl spacing-related errors

This patch fixes misc. spacing errors reported by
checkpatch.pl for lustre/llite/file.c

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>