ide: keep pointer to struct device instead of struct pci_dev in ide_hwif_t

Keep pointer to struct device instead of struct pci_dev in ide_hwif_t.

While on it:
* Use *dev->dma_mask instead of pci_dev->dma_mask in ide_toggle_bounce().

There should be no functionality changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/trm290.c b/drivers/ide/pci/trm290.c
index 7b03388..0a29d50 100644
--- a/drivers/ide/pci/trm290.c
+++ b/drivers/ide/pci/trm290.c
@@ -245,7 +245,7 @@
 
 static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
 {
-	struct pci_dev *dev	= hwif->pci_dev;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	unsigned int  cfg_base	= pci_resource_start(dev, 4);
 	unsigned long flags;
 	u8 reg = 0;