scsi: ata: enhance the definition of SET MAX feature field value

There are two other values for SET MAX feature field according to ata
protocol. So definite them.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

include/linux/ata.h

@@ -448,6 +448,8 @@ enum {
 	ATA_SET_MAX_LOCK	= 0x02,
 	ATA_SET_MAX_UNLOCK	= 0x03,
 	ATA_SET_MAX_FREEZE_LOCK	= 0x04,
+	ATA_SET_MAX_PASSWD_DMA	= 0x05,
+	ATA_SET_MAX_UNLOCK_DMA	= 0x06,
 
 	/* feature values for DEVICE CONFIGURATION OVERLAY */
 	ATA_DCO_RESTORE		= 0xC0,