staging: lustre: fixed const warnings (struct seq_operations should be const in these contexts)

Minor warnings spotted by checkpatch.pl in lustre regarding const correctness: struct seq_operations should be const.

Signed-off-by: Xavier Roche <roche+git@httrack.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 files changed