[libata] move some PIO state init to its proper place

drivers/scsi/libata-core.c

@@ -2245,6 +2245,7 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
 		qc->scsicmd = NULL;
 		qc->ap = ap;
 		qc->dev = dev;
+		qc->cursect = qc->cursg = qc->cursg_ofs = 0;
 		INIT_LIST_HEAD(&qc->node);
 		init_MUTEX_LOCKED(&qc->sem);
 

drivers/scsi/libata-scsi.c

@@ -223,7 +223,6 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
 	struct ata_taskfile *tf = &qc->tf;
 	unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48;
 
-	qc->cursect = qc->cursg = qc->cursg_ofs = 0;
 	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
 	tf->hob_nsect = 0;
 	tf->hob_lbal = 0;