ASoC: rt5645: Convert to SYSTEM_SLEEP_PM_OPS()

Use the newer SYSTEM_SLEEP_PM_OPS() macro instead of
SET_SYSTEM_SLEEP_PM_OPS() together with pm_ptr(), which allows us
dropping ugly __maybe_unused attributes.

This optimizes slightly when CONFIG_PM is disabled, too.

Cc: Oder Chiou <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>
Reviewed-by: Charles Keepax <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/rt5645.c

···
 		gpiod_set_value(rt5645->gpiod_cbj_sleeve, 0);
 }
 
-static int __maybe_unused rt5645_sys_suspend(struct device *dev)
+static int rt5645_sys_suspend(struct device *dev)
 {
 	struct rt5645_priv *rt5645 = dev_get_drvdata(dev);
 
···
 	return 0;
 }
 
-static int __maybe_unused rt5645_sys_resume(struct device *dev)
+static int rt5645_sys_resume(struct device *dev)
 {
 	struct rt5645_priv *rt5645 = dev_get_drvdata(dev);
 
···
 }
 
 static const struct dev_pm_ops rt5645_pm = {
-	SET_SYSTEM_SLEEP_PM_OPS(rt5645_sys_suspend, rt5645_sys_resume)
+	SYSTEM_SLEEP_PM_OPS(rt5645_sys_suspend, rt5645_sys_resume)
 };
 
 static struct i2c_driver rt5645_i2c_driver = {
···
 		.name = "rt5645",
 		.of_match_table = of_match_ptr(rt5645_of_match),
 		.acpi_match_table = ACPI_PTR(rt5645_acpi_match),
-		.pm = &rt5645_pm,
+		.pm = pm_ptr(&rt5645_pm),
 	},
 	.probe = rt5645_i2c_probe,
 	.remove = rt5645_i2c_remove,