PCI: xgene-msi: Use devm_platform_get_and_ioremap_resource()

Convert calls to platform_get_resource() and devm_ioremap_resource()
into a single call to devm_platform_get_and_ioremap_resource(), to
simplify the code.

This new helper added in commit 890cc39 ("drivers: provide
devm_platform_get_and_ioremap_resource()") does what both of the
other separate functions do.

[kwilczynski: commit log]
Link: https://lore.kernel.org/linux-pci/20230323090011.66754-1-yang.lee@linux.alibaba.com
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

Author: Yang Li

drivers/pci/controller/pci-xgene-msi.c

@@ -441,8 +441,7 @@ static int xgene_msi_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, xgene_msi);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	xgene_msi->msi_regs = devm_ioremap_resource(&pdev->dev, res);
+	xgene_msi->msi_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(xgene_msi->msi_regs)) {
 		rc = PTR_ERR(xgene_msi->msi_regs);
 		goto error;