scsi: qla2xxx: Change default ZIO threshold.

Change default ZIO threshold to an optimized value.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -4220,7 +4220,7 @@ struct qla_hw_data {
 
 	atomic_t zio_threshold;
 	uint16_t last_zio_threshold;
-#define DEFAULT_ZIO_THRESHOLD 64
+#define DEFAULT_ZIO_THRESHOLD 5
 };
 
 #define FW_ABILITY_MAX_SPEED_MASK	0xFUL