dt-bindings: hwmon: Add Sparx5 temperature sensor

This add the DT binding specification for the Sparx5 temperature
sensor.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200618135951.25441-2-lars.povlsen@microchip.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>