PCI: mvebu: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Link: https://lore.kernel.org/linux-pci/20230321193208.366561-13-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

drivers/pci/controller/pci-mvebu.c

@@ -1649,7 +1649,7 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
 	return pci_host_probe(bridge);
 }
 
-static int mvebu_pcie_remove(struct platform_device *pdev)
+static void mvebu_pcie_remove(struct platform_device *pdev)
 {
 	struct mvebu_pcie *pcie = platform_get_drvdata(pdev);
 	struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
@@ -1707,8 +1707,6 @@ static int mvebu_pcie_remove(struct platform_device *pdev)
 		/* Power down card and disable clocks. Must be the last step. */
 		mvebu_pcie_powerdown(port);
 	}
-
-	return 0;
 }
 
 static const struct of_device_id mvebu_pcie_of_match_table[] = {
@@ -1730,7 +1728,7 @@ static struct platform_driver mvebu_pcie_driver = {
 		.pm = &mvebu_pcie_pm_ops,
 	},
 	.probe = mvebu_pcie_probe,
-	.remove = mvebu_pcie_remove,
+	.remove_new = mvebu_pcie_remove,
 };
 module_platform_driver(mvebu_pcie_driver);