serial: 8250_pci: Replace custom code with pci_match_id()

	/* Exar devices */

	{ PCI_VDEVICE(EXAR, PCI_ANY_ID), },

	{ PCI_VDEVICE(COMMTECH, PCI_ANY_ID), },

	/* End of the black list */

	{ }

};

static int serial_pci_is_class_communication(struct pci_dev *dev)

	return 0;

}

static int serial_pci_is_blacklisted(struct pci_dev *dev)

{

	const struct pci_device_id *bldev;

	/*

	 * Do not access blacklisted devices that are known not to

	 * feature serial ports or are handled by other modules.

	 */

	for (bldev = blacklist;

	     bldev < blacklist + ARRAY_SIZE(blacklist);

	     bldev++) {

		if (dev->vendor == bldev->vendor &&

		    dev->device == bldev->device)

			return -ENODEV;

	}

	return 0;

}

/*

 * Given a complete unknown PCI device, try to use some heuristics to

 * guess what the configuration might be, based on the pitiful PCI

	struct pci_serial_quirk *quirk;

	struct serial_private *priv;

	const struct pciserial_board *board;

	const struct pci_device_id *exclude;

	struct pciserial_board tmp;

	int rc;

	board = &pci_boards[ent->driver_data];

	rc = serial_pci_is_blacklisted(dev);

	if (rc)

		return rc;

	exclude = pci_match_id(blacklist, dev);

	if (exclude)

		return -ENODEV;

	rc = pcim_enable_device(dev);

	pci_save_state(dev);