staging: comedi: amplc_pci224: checkpatch.pl cleanup (else after return)

Fix this checkpatch.pl warning:

WARNING: else is not generally useful after a break or return
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/amplc_pci224.c

@@ -1255,9 +1255,8 @@ static int pci224_attach_common(struct comedi_device *dev,
 			dev_err(dev->class_dev,
 				"error! unable to allocate irq %u\n", irq);
 			return ret;
-		} else {
-			dev->irq = irq;
 		}
+		dev->irq = irq;
 	}
 
 	return 0;