drm: Reset LUT/gamma table before the first drmModeSetCrtc call
When we takeover the kms master from whatever process came before us the LUT table may be a mess making the graphics funky. So lets reset it once before our first drmModeSetCrtc call.
Closes #59 (closed)
Signed-off-by: Hans de Goede hdegoede@redhat.com