pnfs-obj: don't leak objio_state if ore_write/read fails

commit 9909d45a8557455ca5f8ee7af0f253debc851f1a upstream.

[Bug since 3.2 Kernel]
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>