staging: vt6656: Don't needlessly test for NULL before release_firmware()

Checking for a NULL pointer before calling release_firmware() is
redundant since the function does that check itself.
Signed-off-by: NJesper Juhl <jj@chaosbits.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/main_usb.c

@@ -1257,9 +1257,7 @@ static void __devexit vt6656_disconnect(struct usb_interface *intf)
 	}
 
 	device_release_WPADEV(device);
-
-	if (device->firmware)
-		release_firmware(device->firmware);
+	release_firmware(device->firmware);
 
 	usb_set_intfdata(intf, NULL);
 	usb_put_dev(interface_to_usbdev(intf));