Staging: comedi: contec_pci_dio.c: Checkpatch cleanup

WARNING: braces {} are not necessary for single statement blocks
+		if (dev->iobase) {
+			comedi_pci_disable(devpriv->pci_dev);
+		}

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>