PCI: rcar-gen2: 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 890cc39a8799 ("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/[e-mail]
Signed-off-by: Yang Li <[e-mail]>
Signed-off-by: Krzysztof Wilczyński <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>

drivers/pci/controller/pci-rcar-gen2.c

···
 	priv = pci_host_bridge_priv(bridge);
 	bridge->sysdata = priv;
 
-	cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	reg = devm_ioremap_resource(dev, cfg_res);
+	reg = devm_platform_get_and_ioremap_resource(pdev, 0, &cfg_res);
 	if (IS_ERR(reg))
 		return PTR_ERR(reg);