[media] vcodec: mediatek: mark pm functions as __maybe_unused

When CONFIG_PM is disabled, we get a couple of unused functions:

drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:927:13: error: 'mtk_jpeg_clk_off' defined but not used [-Werror=unused-function]
 static void mtk_jpeg_clk_off(struct mtk_jpeg_dev *jpeg)
             ^~~~~~~~~~~~~~~~
drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:916:13: error: 'mtk_jpeg_clk_on' defined but not used [-Werror=unused-function]
 static void mtk_jpeg_clk_on(struct mtk_jpeg_dev *jpeg)

Rather than adding more error-prone #ifdefs around those, this patch
removes the existing #ifdef checks and marks the PM functions as __maybe_unused
to let gcc do the right thing.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rick Chang <rick.chang@mediatek.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c

@@ -1214,8 +1214,7 @@ static int mtk_jpeg_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int mtk_jpeg_pm_suspend(struct device *dev)
+static __maybe_unused int mtk_jpeg_pm_suspend(struct device *dev)
 {
 	struct mtk_jpeg_dev *jpeg = dev_get_drvdata(dev);
 
@@ -1225,7 +1224,7 @@ static int mtk_jpeg_pm_suspend(struct device *dev)
 	return 0;
 }
 
-static int mtk_jpeg_pm_resume(struct device *dev)
+static __maybe_unused int mtk_jpeg_pm_resume(struct device *dev)
 {
 	struct mtk_jpeg_dev *jpeg = dev_get_drvdata(dev);
 
@@ -1234,10 +1233,8 @@ static int mtk_jpeg_pm_resume(struct device *dev)
 
 	return 0;
 }
-#endif /* CONFIG_PM */
 
-#ifdef CONFIG_PM_SLEEP
-static int mtk_jpeg_suspend(struct device *dev)
+static __maybe_unused int mtk_jpeg_suspend(struct device *dev)
 {
 	int ret;
 
@@ -1248,7 +1245,7 @@ static int mtk_jpeg_suspend(struct device *dev)
 	return ret;
 }
 
-static int mtk_jpeg_resume(struct device *dev)
+static __maybe_unused int mtk_jpeg_resume(struct device *dev)
 {
 	int ret;
 
@@ -1259,7 +1256,6 @@ static int mtk_jpeg_resume(struct device *dev)
 
 	return ret;
 }
-#endif /* CONFIG_PM_SLEEP */
 
 static const struct dev_pm_ops mtk_jpeg_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(mtk_jpeg_suspend, mtk_jpeg_resume)