ide: add IDE_HFLAG_NO_ATAPI_DMA host flag

Add IDE_HFLAG_NO_ATAPI_DMA host flag and set it in host drivers which
don't support ATAPI DMA.  Then remove no longer needed hwif->atapi_dma.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 5ca14ae..4c81083 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -899,8 +899,8 @@
 	hwif->ultra_mask = 0x7f;
 	hwif->mwdma_mask = 0x07;
 
-	if (!is_sata(hwif))
-		hwif->atapi_dma = 1;
+	if (is_sata(hwif))
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 
 	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 		hwif->cbl = ata66_siimage(hwif);