ASoC: fsl_ssi: Switch to SYSTEM_SLEEP_PM_OPS

Replace SET_SYSTEM_SLEEP_PM_OPS() with its modern SYSTEM_SLEEP_PM_OPS()
alternative.

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

This allows removing the CONFIG_PM_SLEEP ifdefery from the
suspend/resume() functions.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Link: https://patch.msgid.link/20240808184944.267686-5-festevam@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_ssi.c

@@ -1693,7 +1693,6 @@ static void fsl_ssi_remove(struct platform_device *pdev)
 	}
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int fsl_ssi_suspend(struct device *dev)
 {
 	struct fsl_ssi *ssi = dev_get_drvdata(dev);
@@ -1723,17 +1722,16 @@ static int fsl_ssi_resume(struct device *dev)
 
 	return regcache_sync(regs);
 }
-#endif /* CONFIG_PM_SLEEP */
 
 static const struct dev_pm_ops fsl_ssi_pm = {
-	SET_SYSTEM_SLEEP_PM_OPS(fsl_ssi_suspend, fsl_ssi_resume)
+	SYSTEM_SLEEP_PM_OPS(fsl_ssi_suspend, fsl_ssi_resume)
 };
 
 static struct platform_driver fsl_ssi_driver = {
 	.driver = {
 		.name = "fsl-ssi-dai",
 		.of_match_table = fsl_ssi_ids,
-		.pm = &fsl_ssi_pm,
+		.pm = pm_sleep_ptr(&fsl_ssi_pm),
 	},
 	.probe = fsl_ssi_probe,
 	.remove_new = fsl_ssi_remove,