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/cs5520.c b/drivers/ide/pci/cs5520.c
index a8bf494..b7906a9 100644
--- a/drivers/ide/pci/cs5520.c
+++ b/drivers/ide/pci/cs5520.c
@@ -125,6 +125,7 @@
  
 static int cs5520_dma_on(ide_drive_t *drive)
 {
+	/* ATAPI is harder so leave it for now */
 	drive->vdma = 1;
 	return 0;
 }
@@ -141,8 +142,6 @@
 
 	hwif->ide_dma_on = &cs5520_dma_on;
 
-	/* ATAPI is harder so leave it for now */
-	hwif->atapi_dma = 0;
 	hwif->ultra_mask = 0;
 	hwif->swdma_mask = 0;
 	hwif->mwdma_mask = 0;
@@ -156,7 +155,8 @@
 		.autodma	= AUTODMA,			\
 		.bootable	= ON_BOARD,			\
 		.host_flags	= IDE_HFLAG_ISA_PORTS |		\
-				  IDE_HFLAG_VDMA,		\
+				  IDE_HFLAG_VDMA |		\
+				  IDE_HFLAG_NO_ATAPI_DMA,	\
 		.pio_mask	= ATA_PIO4,			\
 	}