drm/radeon/kms/pm: clean power state printing

Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_pm.c

@@ -42,7 +42,7 @@ static const char *pm_state_names[4] = {
 };
 
 static const char *pm_state_types[5] = {
-	"Default",
+	"",
 	"Powersave",
 	"Battery",
 	"Balanced",