dt-bindings: input: touchscreen: fsl,imx6ul-tsc convert to YAML

Convert the i.MX6UL touchscreen DT binding to YAML.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20240226212740.2019837-3-sre@kernel.org


Signed-off-by: Rob Herring <robh@kernel.org>