vc4: piglit spec/!opengl 1.1/draw-pixels regression
Piglit spec/!opengl 1.1/draw-pixels started failing on VC4 since 7e07f7f9 ("u_blitter: fix fs used when no color emitted") landed.
Piglit spec/!opengl 1.1/draw-pixels started failing on VC4 since 7e07f7f9 ("u_blitter: fix fs used when no color emitted") landed.