drm/radeon: fix GUI idle IH debug statements

debug statement for GUI idle interrupt is wrong and incorrectly
reports CP EOP interrupt; trivial issue, but confusing for
someone trying to distinguish interrupt sources while debugging
... fixed

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -2944,7 +2944,7 @@ restart_ih:
 			radeon_fence_process(rdev);
 			break;
 		case 233: /* GUI IDLE */
-			DRM_DEBUG("IH: CP EOP\n");
+			DRM_DEBUG("IH: GUI idle\n");
 			rdev->pm.gui_idle = true;
 			wake_up(&rdev->irq.idle_queue);
 			break;

drivers/gpu/drm/radeon/r600.c

@@ -3444,7 +3444,7 @@ restart_ih:
 			radeon_fence_process(rdev);
 			break;
 		case 233: /* GUI IDLE */
-			DRM_DEBUG("IH: CP EOP\n");
+			DRM_DEBUG("IH: GUI idle\n");
 			rdev->pm.gui_idle = true;
 			wake_up(&rdev->irq.idle_queue);
 			break;