LU-7258 osc: fix signed one bit field

LU-7258 osc: fix signed one bit field

Bit field 'oi_lockless' and 'oi_is_active' has one bit and is signed.

Change-Id: Ib2fb92faf29ced057438a090dad382258eb9fc40
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: http://review.whamcloud.com/19196
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Frank Zago <fzago@cray.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>