drm/tegra: Remove #ifdef guards for PM related functions

Use the RUNTIME_PM_OPS() and pm_ptr() macros to handle the
.runtime_suspend/.runtime_resume callbacks.

These macros allow the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_PM is disabled, without having
to use #ifdef guards.

This has the advantage of always compiling these functions in,
independently of any Kconfig option. Thanks to that, bugs and other
regressions are subsequently easier to catch.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/dpaux.c

@@ -598,7 +598,6 @@ static int tegra_dpaux_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
 static int tegra_dpaux_suspend(struct device *dev)
 {
 	struct tegra_dpaux *dpaux = dev_get_drvdata(dev);
@@ -657,10 +656,9 @@ static int tegra_dpaux_resume(struct device *dev)
 	clk_disable_unprepare(dpaux->clk);
 	return err;
 }
-#endif
 
 static const struct dev_pm_ops tegra_dpaux_pm_ops = {
-	SET_RUNTIME_PM_OPS(tegra_dpaux_suspend, tegra_dpaux_resume, NULL)
+	RUNTIME_PM_OPS(tegra_dpaux_suspend, tegra_dpaux_resume, NULL)
 };
 
 static const struct tegra_dpaux_soc tegra124_dpaux_soc = {
@@ -694,7 +692,7 @@ struct platform_driver tegra_dpaux_driver = {
 	.driver = {
 		.name = "tegra-dpaux",
 		.of_match_table = tegra_dpaux_of_match,
-		.pm = &tegra_dpaux_pm_ops,
+		.pm = pm_ptr(&tegra_dpaux_pm_ops),
 	},
 	.probe = tegra_dpaux_probe,
 	.remove = tegra_dpaux_remove,