fpga/dfl-pci.c: Replace deprecated PCI functions

pcim_iomap_regions() and pcim_iomap_table() have been deprecated by the
PCI subsystem in commit e354bb84a4c1 ("PCI: Deprecate
pcim_iomap_table(), pcim_iomap_regions_request_all()").

Port dfl-pci.c to the successor, pcim_iomap_region().

Consistently, replace pcim_iounmap_regions() with pcim_iounmap_region().

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Philipp Stanner <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Acked-by: Xu Yilun <[e-mail]>

drivers/fpga/dfl-pci.c

···
 	struct dfl_fpga_cdev *cdev;	/* container device */
 };
 
-static void __iomem *cci_pci_ioremap_bar0(struct pci_dev *pcidev)
-{
-	if (pcim_iomap_regions(pcidev, BIT(0), DRV_NAME))
-		return NULL;
-
-	return pcim_iomap_table(pcidev)[0];
-}
-
 static int cci_pci_alloc_irq(struct pci_dev *pcidev)
 {
 	int ret, nvec = pci_msix_vec_count(pcidev);
···
 	u64 v;
 
 	/* start to find Device Feature List from Bar 0 */
-	base = cci_pci_ioremap_bar0(pcidev);
-	if (!base)
-		return -ENOMEM;
+	base = pcim_iomap_region(pcidev, 0, DRV_NAME);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
 	/*
 	 * PF device has FME and Ports/AFUs, and VF device only has one
···
 	}
 
 	/* release I/O mappings for next step enumeration */
-	pcim_iounmap_regions(pcidev, BIT(0));
+	pcim_iounmap_region(pcidev, 0);
 
 	return ret;
 }