Now that the resistive touchpanel driver supports thermal sensors,
add the "#thermal-sensor-cells" property as required by the thermal
framework.
Signed-off-by: NChen-Yu Tsai <wens@csie.org>
Acked-by: NEduardo Valentin <edubezval@gmail.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>