media: mali-c55: Mark pm handlers as __maybe_unused

As the Mali-C55 driver is instrumented to work without depending on
CONFIG_PM, mark the two pm_runtime handlers as __maybe_unused to
suppress the compiler warning when compiling without CONFIG_PM.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

Author: Jacopo Mondi

drivers/media/platform/arm/mali-c55/mali-c55-core.c

@@ -707,7 +707,7 @@ static void __mali_c55_power_off(struct mali_c55 *mali_c55)
 	clk_bulk_disable_unprepare(ARRAY_SIZE(mali_c55->clks), mali_c55->clks);
 }
 
-static int mali_c55_runtime_suspend(struct device *dev)
+static int __maybe_unused mali_c55_runtime_suspend(struct device *dev)
 {
 	struct mali_c55 *mali_c55 = dev_get_drvdata(dev);
 
@@ -770,7 +770,7 @@ static int __mali_c55_power_on(struct mali_c55 *mali_c55)
 	return 0;
 }
 
-static int mali_c55_runtime_resume(struct device *dev)
+static int __maybe_unused mali_c55_runtime_resume(struct device *dev)
 {
 	struct mali_c55 *mali_c55 = dev_get_drvdata(dev);
 	int ret;