In order to allow passing additional pre/post callbacks. This allows
further re-use of the simple_head_enable() function instead of
creating a similar dedicated function. We can then re-use the same
function for enabling remote outputs.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Essentially ensures that wet_output_set_eotf_mode() and
wet_output_set_colorimetry_mode() work as intended.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>