drm/bochs: Remove references to struct drm_device.pdev

Using struct drm_device.pdev is deprecated. Convert bochs to struct
drm_device.dev. No functional changes.

Signed-off-by: Thomas Zimmermann <[e-mail]>
Acked-by: Gerd Hoffmann <[e-mail]>
Acked-by: Sam Ravnborg <[e-mail]>
Cc: Gerd Hoffmann <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/bochs/bochs_drv.c

···
 	if (ret)
 		goto err_free_dev;
 
-	dev->pdev = pdev;
 	pci_set_drvdata(pdev, dev);
 
 	ret = bochs_load(dev);

drivers/gpu/drm/bochs/bochs_hw.c

···
 int bochs_hw_init(struct drm_device *dev)
 {
 	struct bochs_device *bochs = dev->dev_private;
-	struct pci_dev *pdev = dev->pdev;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	unsigned long addr, size, mem, ioaddr, iosize;
 	u16 id;
 
···
 		release_region(VBE_DISPI_IOPORT_INDEX, 2);
 	if (bochs->fb_map)
 		iounmap(bochs->fb_map);
-	pci_release_regions(dev->pdev);
+	pci_release_regions(to_pci_dev(dev->dev));
 	kfree(bochs->edid);
 }