iwlwifi: allow pci_enable_msi fail

Continue the init process even fail to enable msi

out_iounmap is no longer used, remove it

Reported-by: werner <[e-mail]>
Tested-by: werner <[e-mail]>
Signed-off-by: Wey-Yi Guy <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/iwlwifi/iwl-pci.c

···
 	pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
 
 	err = pci_enable_msi(pdev);
-	if (err) {
-		dev_printk(KERN_ERR, &pdev->dev, "pci_enable_msi failed");
-		goto out_iounmap;
-	}
+	if (err)
+		dev_printk(KERN_ERR, &pdev->dev,
+			"pci_enable_msi failed(0X%x)", err);
 
 	/* TODO: Move this away, not needed if not MSI */
 	/* enable rfkill interrupt: hw bug w/a */
···
 
 out_disable_msi:
 	pci_disable_msi(pdev);
-out_iounmap:
 	pci_iounmap(pdev, pci_bus->hw_base);
 out_pci_release_regions:
 	pci_set_drvdata(pdev, NULL);