[PATCH] Patch/resubmit(2.5.50): Eliminate pci_dev.driver_data

	To review, this patch deletes pci_dev.driver_data, using the
existing pci_dev.device.driver_data field instead, thereby shrinking
struct pci_dev by four bytes on 32-bit machines.  The few device
drivers that attempted to directly reference pci_dev.driver_data were
fixed in a patch of mine that Jeff Garzik got into 2.5.45.  Also,
making this change should help with memory allocation improvements in
the future, although that's a separate issue.

include/linux/pci.h

@@ -344,7 +344,6 @@ struct pci_dev {
 	u8		rom_base_reg;	/* which config register controls the ROM */
 
 	struct pci_driver *driver;	/* which driver has allocated this device */
-	void		*driver_data;	/* data private to the driver */
 	u64		dma_mask;	/* Mask of the bits of bus address this
 					   device implements.  Normally this is
 					   0xffffffff.  You only need to change
@@ -753,12 +752,12 @@ static inline int pci_module_init(struct pci_driver *drv)
  */
 static inline void *pci_get_drvdata (struct pci_dev *pdev)
 {
-	return pdev->driver_data;
+	return pdev->dev.driver_data;
 }
 
 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
 {
-	pdev->driver_data = data;
+	pdev->dev.driver_data = data;
 }
 
 /*