drm/radeon/r600/kms: rv670 is not DCE3

RV670 was using the wrong modesetting code.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon.h

@@ -108,9 +108,9 @@ enum radeon_family {
 	CHIP_R600,
 	CHIP_RV610,
 	CHIP_RV630,
+	CHIP_RV670,
 	CHIP_RV620,
 	CHIP_RV635,
-	CHIP_RV670,
 	CHIP_RS780,
 	CHIP_RS880,
 	CHIP_RV770,