[PATCH] drm: tegra: Fix warning in PM ops

[Vincenzo Frascino]

The tegra driver can be compiled without CONFIG_PM_SLEEP enabled.
In this case the compilation triggers the warning below:

drivers/gpu/drm/tegra/sor.c:3984:12: warning: ‘tegra_sor_resume’
defined but not used [-Wunused-function]
 3984 | static int tegra_sor_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~~~
drivers/gpu/drm/tegra/sor.c:3970:12: warning: ‘tegra_sor_suspend’
defined but not used [-Wunused-function]
 3970 | static int tegra_sor_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~

Fix the warning adding __maybe_unused to the PM functions.

Cc: Thierry Reding <thierry.reding at gmail.com>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Jonathan Hunter <jonathanh at nvidia.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino at arm.com>
---
 drivers/gpu/drm/tegra/sor.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index a68d3b36b972..69b9ebee7486 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -3912,7 +3912,7 @@ static int tegra_sor_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int tegra_sor_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra_sor_runtime_suspend(struct device *dev)
 {
 	struct tegra_sor *sor = dev_get_drvdata(dev);
 	int err;
@@ -3934,7 +3934,7 @@ static int tegra_sor_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_sor_runtime_resume(struct device *dev)
+static int __maybe_unused tegra_sor_runtime_resume(struct device *dev)
 {
 	struct tegra_sor *sor = dev_get_drvdata(dev);
 	int err;
@@ -3967,7 +3967,7 @@ static int tegra_sor_runtime_resume(struct device *dev)
 	return 0;
 }
 
-static int tegra_sor_suspend(struct device *dev)
+static int __maybe_unused tegra_sor_suspend(struct device *dev)
 {
 	struct tegra_sor *sor = dev_get_drvdata(dev);
 	int err;
@@ -3981,7 +3981,7 @@ static int tegra_sor_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_sor_resume(struct device *dev)
+static int __maybe_unused tegra_sor_resume(struct device *dev)
 {
 	struct tegra_sor *sor = dev_get_drvdata(dev);
 	int err;
-- 
2.25.0