spi: mxs: 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 annotations from the
suspend/resume() functions.

Signed-off-by: Fabio Estevam <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-mxs.c

···
 	return ret;
 }
 
-static int __maybe_unused mxs_spi_suspend(struct device *dev)
+static int mxs_spi_suspend(struct device *dev)
 {
 	struct spi_controller *host = dev_get_drvdata(dev);
 	int ret;
···
 		return 0;
 }
 
-static int __maybe_unused mxs_spi_resume(struct device *dev)
+static int mxs_spi_resume(struct device *dev)
 {
 	struct spi_controller *host = dev_get_drvdata(dev);
 	int ret;
···
 }
 
 static const struct dev_pm_ops mxs_spi_pm = {
-	SET_RUNTIME_PM_OPS(mxs_spi_runtime_suspend,
-			   mxs_spi_runtime_resume, NULL)
-	SET_SYSTEM_SLEEP_PM_OPS(mxs_spi_suspend, mxs_spi_resume)
+	RUNTIME_PM_OPS(mxs_spi_runtime_suspend, mxs_spi_runtime_resume, NULL)
+	SYSTEM_SLEEP_PM_OPS(mxs_spi_suspend, mxs_spi_resume)
 };
 
 static const struct of_device_id mxs_spi_dt_ids[] = {
···
 	.driver	= {
 		.name	= DRIVER_NAME,
 		.of_match_table = mxs_spi_dt_ids,
-		.pm = &mxs_spi_pm,
+		.pm = pm_ptr(&mxs_spi_pm),
 	},
 };