comedi: amplc_dio200_pci: Conditionally remove devices that use port I/O

In a future patch, the port I/O functions (`inb()`, `outb()`, and
friends will only be declared in the `HAS_IOPORT` configuration option
is enabled.

The amplc_dio200_pci module supports various Amplicon PCI and PCI
Express devices. Some of the supported devices (the PCI ones) use port
I/O, and some of them (the PCIe ones) only use memory-mapped I/O.

Conditionally compile in support for the devices that need port I/O if
and only if the `CONFIG_HAS_IOPORT` macro is defined.

Add a run-time check in `dio200_pci_auto_attach()` to return an error if
the device actually requires port I/O (based on the PCI BAR resource
flags) but the `HAS_IOPORT` configuration option is not enabled.

Cc: Arnd Bergmann <[e-mail]>
Cc: Niklas Schnelle <[e-mail]>
Signed-off-by: Ian Abbott <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/comedi/drivers/amplc_dio200_pci.c

···
  */
 
 enum dio200_pci_model {
+#ifdef CONFIG_HAS_IOPORT
 	pci215_model,
 	pci272_model,
+#endif /* CONFIG_HAS_IOPORT */
 	pcie215_model,
 	pcie236_model,
 	pcie296_model
 };
 
 static const struct dio200_board dio200_pci_boards[] = {
+#ifdef CONFIG_HAS_IOPORT
 	[pci215_model] = {
 		.name		= "pci215",
 		.mainbar	= 2,
···
 		.sdinfo		= { 0x00, 0x08, 0x10, 0x3f },
 		.has_int_sce	= true,
 	},
+#endif /* CONFIG_HAS_IOPORT */
 	[pcie215_model] = {
 		.name		= "pcie215",
 		.mainbar	= 1,
···
 				"error! cannot remap registers\n");
 			return -ENOMEM;
 		}
-	} else {
+	} else if (IS_ENABLED(CONFIG_HAS_IOPORT)) {
 		dev->iobase = pci_resource_start(pci_dev, bar);
+	} else {
+		dev_err(dev->class_dev,
+			"error! need I/O port support\n");
+		return -ENXIO;
 	}
 
 	if (board->is_pcie) {
···
 };
 
 static const struct pci_device_id dio200_pci_table[] = {
+#ifdef CONFIG_HAS_IOPORT
 	{ PCI_VDEVICE(AMPLICON, 0x000b), pci215_model },
 	{ PCI_VDEVICE(AMPLICON, 0x000a), pci272_model },
+#endif /* CONFIG_HAS_IOPORT */
 	{ PCI_VDEVICE(AMPLICON, 0x0011), pcie236_model },
 	{ PCI_VDEVICE(AMPLICON, 0x0012), pcie215_model },
 	{ PCI_VDEVICE(AMPLICON, 0x0014), pcie296_model },