scsi: libsas: make use of ata_port_is_frozen() helper

Clean up the code by making use of the newly introduced
ata_port_is_frozen() helper function.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/scsi/libsas/sas_ata.c

@@ -101,7 +101,7 @@ static void sas_ata_task_done(struct sas_task *task)
 
 	spin_lock_irqsave(ap->lock, flags);
 	/* check if we lost the race with libata/sas_ata_post_internal() */
-	if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
+	if (unlikely(ata_port_is_frozen(ap))) {
 		spin_unlock_irqrestore(ap->lock, flags);
 		if (qc->scsicmd)
 			goto qc_already_gone;