dt-bindings: input/touchscreen: imagis: add compatible for IST3032C

IST3032C is a touchscreen IC which seems mostly compatible with IST3038C
except that it reports a different chip ID value.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Karel Balej <balejk@matfyz.cz>
Link: https://lore.kernel.org/r/20240301164659.13240-5-karelb@gimli.ms.mff.cuni.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>