ASoC: wm8804: Convert to EXPORT_GPL_DEV_PM_OPS()

Use the newer EXPORT_GPL_DEV_PM_OPS() macro together with pm_ptr(),
which allows us to drop superfluous CONFIG_PM ifdefs.

This optimizes slightly when CONFIG_PM is disabled, too.

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

sound/soc/codecs/wm8804-i2c.c

···
 static struct i2c_driver wm8804_i2c_driver = {
 	.driver = {
 		.name = "wm8804",
-		.pm = &wm8804_pm,
+		.pm = pm_ptr(&wm8804_pm),
 		.of_match_table = of_match_ptr(wm8804_of_match),
 		.acpi_match_table = ACPI_PTR(wm8804_acpi_match),
 	},

sound/soc/codecs/wm8804-spi.c

···
 static struct spi_driver wm8804_spi_driver = {
 	.driver = {
 		.name = "wm8804",
-		.pm = &wm8804_pm,
+		.pm = pm_ptr(&wm8804_pm),
 		.of_match_table = wm8804_of_match,
 	},
 	.probe = wm8804_spi_probe,

sound/soc/codecs/wm8804.c

···
 }
 EXPORT_SYMBOL_GPL(wm8804_remove);
 
-#if IS_ENABLED(CONFIG_PM)
 static int wm8804_runtime_resume(struct device *dev)
 {
 	struct wm8804_priv *wm8804 = dev_get_drvdata(dev);
···
 
 	return 0;
 }
-#endif
 
-const struct dev_pm_ops wm8804_pm = {
-	SET_RUNTIME_PM_OPS(wm8804_runtime_suspend, wm8804_runtime_resume, NULL)
+EXPORT_GPL_DEV_PM_OPS(wm8804_pm) = {
+	RUNTIME_PM_OPS(wm8804_runtime_suspend, wm8804_runtime_resume, NULL)
 };
-EXPORT_SYMBOL_GPL(wm8804_pm);
 
 MODULE_DESCRIPTION("ASoC WM8804 driver");
 MODULE_AUTHOR("Dimitris Papastamos <[e-mail]>");