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/triflex.c b/drivers/ide/pci/triflex.c
index ae52a96..ca49cd7 100644
--- a/drivers/ide/pci/triflex.c
+++ b/drivers/ide/pci/triflex.c
@@ -43,7 +43,7 @@
 static void triflex_set_mode(ide_drive_t *drive, const u8 speed)
 {
 	ide_hwif_t *hwif = HWIF(drive);
-	struct pci_dev *dev = hwif->pci_dev;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
 	u8 channel_offset = hwif->channel ? 0x74 : 0x70;
 	u16 timing = 0;
 	u32 triflex_timings = 0;