libata: rename ATA_PROT_ATAPI_* to ATAPI_PROT_*

ATA_PROT_ATAPI_* are ugly and naming schemes between ATA_PROT_* and
ATA_PROT_ATAPI_* are inconsistent causing confusion.  Rename them to
ATAPI_PROT_* and make them consistent with ATA counterpart.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 0841df0..3e78bc2 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -5222,12 +5222,12 @@
 		regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
 		break;
 
-	case ATA_PROT_ATAPI:
-	case ATA_PROT_ATAPI_NODATA:
+	case ATAPI_PROT_PIO:
+	case ATAPI_PROT_NODATA:
 		regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
 		break;
 
-	case ATA_PROT_ATAPI_DMA:
+	case ATAPI_PROT_DMA:
 		regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
 		regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
 		break;