drm/bridge: ite-it66121: Select HDMI or DVI mode based on sink type

drm/bridge: ite-it66121: Select HDMI or DVI mode based on sink type

The driver unconditionally sets the transmission mode to HDMI, which
leads to display output not working with DVI monitors. Check the
connector's display information sink type to identify the correct mode
to configure the bridge.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20260523-it66121-fix-dvi-mode-v5-v5-3-33b4468162f9@redhat.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>