spi: rpc-if: Drop deprecated SIMPLE_DEV_PM_OPS

Replace SIMPLE_DEV_PM_OPS->DEFINE_SIMPLE_DEV_PM_OPS macro and use
pm_sleep_ptr(). This lets us drop the check for CONFIG_PM_SLEEP, and
reduces kernel size in case CONFIG_PM or CONFIG_PM_SLEEP is disabled,
while increasing build coverage.

Also drop the __maybe_unused attribute from PM functions.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20250921112649.104516-2-biju.das.jz@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: bijudas

drivers/spi/spi-rpc-if.c

@@ -196,21 +196,21 @@ static void rpcif_spi_remove(struct platform_device *pdev)
 	pm_runtime_disable(rpc->dev);
 }
 
-static int __maybe_unused rpcif_spi_suspend(struct device *dev)
+static int rpcif_spi_suspend(struct device *dev)
 {
 	struct spi_controller *ctlr = dev_get_drvdata(dev);
 
 	return spi_controller_suspend(ctlr);
 }
 
-static int __maybe_unused rpcif_spi_resume(struct device *dev)
+static int rpcif_spi_resume(struct device *dev)
 {
 	struct spi_controller *ctlr = dev_get_drvdata(dev);
 
 	return spi_controller_resume(ctlr);
 }
 
-static SIMPLE_DEV_PM_OPS(rpcif_spi_pm_ops, rpcif_spi_suspend, rpcif_spi_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(rpcif_spi_pm_ops, rpcif_spi_suspend, rpcif_spi_resume);
 
 static const struct platform_device_id rpc_if_spi_id_table[] = {
 	{ .name = "rpc-if-spi" },
@@ -224,9 +224,7 @@ static struct platform_driver rpcif_spi_driver = {
 	.id_table = rpc_if_spi_id_table,
 	.driver = {
 		.name	= "rpc-if-spi",
-#ifdef CONFIG_PM_SLEEP
-		.pm	= &rpcif_spi_pm_ops,
-#endif
+		.pm	= pm_sleep_ptr(&rpcif_spi_pm_ops),
 	},
 };
 module_platform_driver(rpcif_spi_driver);