ide: merge ->dma_host_{on,off} methods into ->dma_host_set method

Merge ->dma_host_{on,off} methods into ->dma_host_set method
which takes 'int on' argument.

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index b363a96..fa95e79 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -833,7 +833,7 @@
 
 			drive->nice1 = 1;
 
-			if (hwif->dma_host_on)
+			if (hwif->dma_host_set)
 				ide_set_dma(drive);
 		}
 	}