add dpm_set_power_state failure output (7xx-ni)

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/btc_dpm.c

@@ -2329,8 +2329,10 @@ int btc_dpm_set_power_state(struct radeon_device *rdev)
 #if 0
 	/* XXX */
 	ret = rv770_unrestrict_performance_levels_after_switch(rdev);
-	if (ret)
+	if (ret) {
+		DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
 		return ret;
+	}
 #endif
 
 	return 0;

drivers/gpu/drm/radeon/cypress_dpm.c

@@ -2015,8 +2015,10 @@ int cypress_dpm_set_power_state(struct radeon_device *rdev)
 		cypress_notify_link_speed_change_after_state_change(rdev, new_ps, old_ps);
 
 	ret = rv770_unrestrict_performance_levels_after_switch(rdev);
-	if (ret)
+	if (ret) {
+		DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
 		return ret;
+	}
 
 	return 0;
 }

drivers/gpu/drm/radeon/ni_dpm.c

@@ -3795,8 +3795,10 @@ int ni_dpm_set_power_state(struct radeon_device *rdev)
 #if 0
 	/* XXX */
 	ret = ni_unrestrict_performance_levels_after_switch(rdev);
-	if (ret)
+	if (ret) {
+		DRM_ERROR("ni_unrestrict_performance_levels_after_switch failed\n");
 		return ret;
+	}
 #endif
 
 	return 0;

drivers/gpu/drm/radeon/rv770_dpm.c

@@ -2047,8 +2047,10 @@ int rv770_dpm_set_power_state(struct radeon_device *rdev)
 		rv770_program_dcodt_after_state_switch(rdev, new_ps, old_ps);
 	rv770_set_uvd_clock_after_set_eng_clock(rdev, new_ps, old_ps);
 	ret = rv770_unrestrict_performance_levels_after_switch(rdev);
-	if (ret)
+	if (ret) {
+		DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
 		return ret;
+	}
 
 	return 0;
 }