staging: gasket: gasket_get_device drop check for NULL pci_dev

The pci_dev field of a struct gasket_dev can never be NULL, there's no
need to check for this in gasket_get_device().
Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gasket/gasket_core.c

@@ -2026,9 +2026,7 @@ const struct gasket_driver_desc *gasket_get_driver_desc(struct gasket_dev *dev)
  */
 struct device *gasket_get_device(struct gasket_dev *dev)
 {
-	if (dev->pci_dev)
-		return &dev->pci_dev->dev;
-	return NULL;
+	return &dev->pci_dev->dev;
 }
 
 /**