net: fec: Switch to RUNTIME/SYSTEM_SLEEP_PM_OPS()

Replace SET_RUNTIME_PM_OPS()/SET SYSTEM_SLEEP_PM_OPS() with their modern
RUNTIME_PM_OPS() and SYSTEM_SLEEP_PM_OPS() alternatives.

The combined usage of pm_ptr() and RUNTIME_PM_OPS/SYSTEM_SLEEP_PM_OPS()
allows the compiler to evaluate if the runtime suspend/resume() functions
are used at build time or are simply dead code.

This allows removing the __maybe_unused notation from the runtime
suspend/resume() functions.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20240806021628.2524089-1-festevam@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/freescale/fec_main.c

@@ -4606,7 +4606,7 @@ fec_drv_remove(struct platform_device *pdev)
 	free_netdev(ndev);
 }
 
-static int __maybe_unused fec_suspend(struct device *dev)
+static int fec_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
@@ -4659,7 +4659,7 @@ static int __maybe_unused fec_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused fec_resume(struct device *dev)
+static int fec_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
@@ -4714,7 +4714,7 @@ static int __maybe_unused fec_resume(struct device *dev)
 	return ret;
 }
 
-static int __maybe_unused fec_runtime_suspend(struct device *dev)
+static int fec_runtime_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
@@ -4725,7 +4725,7 @@ static int __maybe_unused fec_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused fec_runtime_resume(struct device *dev)
+static int fec_runtime_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
@@ -4746,14 +4746,14 @@ static int __maybe_unused fec_runtime_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops fec_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(fec_suspend, fec_resume)
-	SET_RUNTIME_PM_OPS(fec_runtime_suspend, fec_runtime_resume, NULL)
+	SYSTEM_SLEEP_PM_OPS(fec_suspend, fec_resume)
+	RUNTIME_PM_OPS(fec_runtime_suspend, fec_runtime_resume, NULL)
 };
 
 static struct platform_driver fec_driver = {
 	.driver	= {
 		.name	= DRIVER_NAME,
-		.pm	= &fec_pm_ops,
+		.pm	= pm_ptr(&fec_pm_ops),
 		.of_match_table = fec_dt_ids,
 		.suppress_bind_attrs = true,
 	},