drm/bridge: it66121: Use vid/pid to detect the type of chip

drm/bridge: it66121: Use vid/pid to detect the type of chip

The driver knows exactly which version of the chip is present since
the vid/pid is used to enforce a compatibility. Given that some
devices like IT66121 has potentially been replaced with IT66122 mid
production for many platforms, it makes no sense to use the vid/pid
as an enforcement for compatibility. Instead, detect the ID of the
actual chip in use by matching the corresponding vid/pid and drop the
compatible specific lookup table.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251029150636.3118628-5-nm@ti.com