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/rz1000.c b/drivers/ide/pci/rz1000.c
index 6b10ae2..1d3b2f3 100644
--- a/drivers/ide/pci/rz1000.c
+++ b/drivers/ide/pci/rz1000.c
@@ -32,8 +32,8 @@
 
 static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
 {
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
 	u16 reg;
-	struct pci_dev *dev = hwif->pci_dev;
 
 	if (!pci_read_config_word (dev, 0x40, &reg) &&
 	    !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {