[PATCH] shtc1: add support for device tree bindings

[Chris Ruehl]

Add support for DTS bindings to the shtc driver
The patches add the compatible table and of_property_read* to the
shtc1.c. Newly created Yaml document has been released to the
Documentation/devicetree/hwmon/sensirion,shtc1.yaml

Signed-off-by: Chris Ruehl <chris.ru...@gtsys.com.hk>
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