Update the ITE bridge HDMI it66121 bindings in order to support audio. Signed-off-by: Nicolas Belin <nbelin@baylibre.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220316135733.173950-2-nbelin@baylibre.com