Remove double gamma table write in omap_crtc_atomic_flush().
Fixes commit 492a426a
("drm/omapdrm: Implement gamma_lut atomic crtc properties")
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>