drm/exynos: remove unnecessary runtime pm interfaces

Exyno drm driver has no real hardware device, and
runtime pm operation should be done by sub drivers.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_drv.c

@@ -377,34 +377,8 @@ static int exynos_drm_sys_resume(struct device *dev)
 }
 #endif
 
-#ifdef CONFIG_PM_RUNTIME
-static int exynos_drm_runtime_suspend(struct device *dev)
-{
-	struct drm_device *drm_dev = dev_get_drvdata(dev);
-	pm_message_t message;
-
-	if (pm_runtime_suspended(dev))
-		return 0;
-
-	message.event = PM_EVENT_SUSPEND;
-	return exynos_drm_suspend(drm_dev, message);
-}
-
-static int exynos_drm_runtime_resume(struct device *dev)
-{
-	struct drm_device *drm_dev = dev_get_drvdata(dev);
-
-	if (!pm_runtime_suspended(dev))
-		return 0;
-
-	return exynos_drm_resume(drm_dev);
-}
-#endif
-
 static const struct dev_pm_ops exynos_drm_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
-	SET_RUNTIME_PM_OPS(exynos_drm_runtime_suspend,
-			exynos_drm_runtime_resume, NULL)
 };
 
 int exynos_drm_component_add(struct device *dev,
@@ -487,9 +461,6 @@ static int exynos_drm_add_components(struct device *dev, struct master *m)
 
 static int exynos_drm_bind(struct device *dev)
 {
-	pm_runtime_enable(dev);
-	pm_runtime_get_sync(dev);
-
 	return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 }