usb: chipidea: remove superfluous pci_set_drvdata(pci, NULL)

As drvdata is cleared to NULL at probe failure or at removal by the driver
core, we don't have to call pci_set_drvdata(pci, NULL) any longer in each
driver.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/ci13xxx_pci.c

@@ -111,7 +111,6 @@ static void ci13xxx_pci_remove(struct pci_dev *pdev)
 	struct platform_device *plat_ci = pci_get_drvdata(pdev);
 
 	ci13xxx_remove_device(plat_ci);
-	pci_set_drvdata(pdev, NULL);
 	pci_disable_device(pdev);
 }