[BLOCK] update libata to use new blk_ordered for barriers

Reflect changes in SCSI midlayer and updated to use new
ordered request implementation

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>

diff --cc drivers/scsi/ahci.c
Simple merge

diff --cc drivers/scsi/ata_piix.c
Simple merge

diff --cc drivers/scsi/sata_mv.c
Simple merge

diff --cc drivers/scsi/sata_nv.c
Simple merge

diff --cc drivers/scsi/sata_promise.c
Simple merge

diff --cc drivers/scsi/sata_sil.c
Simple merge

diff --cc drivers/scsi/sata_sil24.c
Simple merge

diff --cc drivers/scsi/sata_sis.c
Simple merge

diff --cc drivers/scsi/sata_svw.c
Simple merge

diff --cc drivers/scsi/sata_sx4.c
Simple merge

diff --cc drivers/scsi/sata_uli.c
Simple merge

diff --cc drivers/scsi/sata_via.c
Simple merge

diff --cc drivers/scsi/sata_vsc.c
Simple merge