drm/vc4: tests: Support a few more plane formats

We'll start testing our planes code in situations where we will use more
than XRGB8888, so let's add a few common pixel formats.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Author: mripard

drivers/gpu/drm/vc4/tests/vc4_mock_plane.c

@@ -19,7 +19,10 @@ static const struct drm_plane_funcs vc4_dummy_plane_funcs = {
 };
 
 static const uint32_t vc4_dummy_plane_formats[] = {
+	DRM_FORMAT_ARGB8888,
 	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_YUV420,
+	DRM_FORMAT_YUV422,
 };
 
 struct drm_plane *vc4_dummy_plane(struct kunit *test, struct drm_device *drm,