PCI: Simplify pci_dev_driver()

Simplify pci_dev_driver() by removing the "else".  The "if" case always
returns, so the "else" is superfluous.  No functional change intended.

Link: https://lore.kernel.org/r/20230824193712.542167-9-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Author: bjorn-helgaas

drivers/pci/pci-driver.c

@@ -1474,14 +1474,15 @@ static struct pci_driver pci_compat_driver = {
  */
 struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
 {
+	int i;
+
 	if (dev->driver)
 		return dev->driver;
-	else {
-		int i;
-		for (i = 0; i <= PCI_ROM_RESOURCE; i++)
-			if (dev->resource[i].flags & IORESOURCE_BUSY)
-				return &pci_compat_driver;
-	}
+
+	for (i = 0; i <= PCI_ROM_RESOURCE; i++)
+		if (dev->resource[i].flags & IORESOURCE_BUSY)
+			return &pci_compat_driver;
+
 	return NULL;
 }
 EXPORT_SYMBOL(pci_dev_driver);