staging: comedi: addi_apci_1516: cleanup apci1516_detach()

This driver uses the comedi auto_config mechanism to attach to
the comedi subsystem. The dev->hw_dev is set by the core so
comedi_to_pci_dev() will always return a valid pcidev. Remove
the unnecessary test.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/addi_apci_1516.c

@@ -289,11 +289,9 @@ static void apci1516_detach(struct comedi_device *dev)
 {
 	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 
-	if (dev->iobase)
+	if (dev->iobase) {
 		apci1516_reset(dev);
-	if (pcidev) {
-		if (dev->iobase)
-			comedi_pci_disable(pcidev);
+		comedi_pci_disable(pcidev);
 	}
 }