drm/i915: Use drm_connector_attach_hdr_output_metadata_property()

Stop hand rolling drm_connector_attach_hdr_output_metadata_property().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220321195006.775-3-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>