drm/radeon/kms: r300 fix CS checker to allow zbuffer-only fastfill

Signed-off-by: Marek Olšák <maraeo@gmail.com>
diff --git a/drivers/gpu/drm/radeon/r100_track.h b/drivers/gpu/drm/radeon/r100_track.h
index fadfe68..f47cdca 100644
--- a/drivers/gpu/drm/radeon/r100_track.h
+++ b/drivers/gpu/drm/radeon/r100_track.h
@@ -75,7 +75,7 @@
 	struct r100_cs_track_texture	textures[R300_TRACK_MAX_TEXTURE];
 	bool				z_enabled;
 	bool                            separate_cube;
-	bool				fastfill;
+	bool				zb_cb_clear;
 	bool				blend_read_enable;
 };