staging: lustre: fix whitespace errors reported by checkpatch.pl

Added/removed spaces and replaced '+1' with '1' in several places to
eliminate SPACING and POINTER_LOCATION errors reported by checkpatch.pl

Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>