[PATCH -next] drm/tegra: sor: Fix unused function warnings

[YueHaibing]

drivers/gpu/drm/tegra/sor.c:3984:12: warning: 'tegra_sor_resume' defined but not used [-Wunused-function]
drivers/gpu/drm/tegra/sor.c:3970:12: warning: 'tegra_sor_suspend' defined but not used [-Wunused-function]
drivers/gpu/drm/tegra/sor.c:3937:12: warning: 'tegra_sor_runtime_resume' defined but not used [-Wunused-function]
drivers/gpu/drm/tegra/sor.c:3915:12: warning: 'tegra_sor_runtime_suspend' defined but not used [-Wunused-function]

Mark these functions as __maybe_unused so gcc can drop them
silently.

Reported-by: Hulk Robot <hulkci at huawei.com>
Signed-off-by: YueHaibing <yuehaibing at huawei.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 a68d3b3..69b9ebe 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;
-- 
2.7.4