drm/radeon: skip suspend/resume on DRM_SWITCH_POWER_DYNAMIC_OFF

Missed this case previously. No need to do anything if the
device is already off.  runtime pm will handle it.
Acked-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_device.c

@@ -1594,7 +1594,8 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
 
 	rdev = dev->dev_private;
 
-	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
+	    dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
 		return 0;
 
 	drm_kms_helper_poll_disable(dev);
@@ -1689,7 +1690,8 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	struct drm_crtc *crtc;
 	int r;
 
-	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
+	    dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
 		return 0;
 
 	if (fbcon) {