dt-bindings: input: touchscreen: elants_i2c: convert to YAML

Convert elants_i2c.txt DT binding to YAML and put into correct directory.

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200423173253.711725-2-david@ixit.cz


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>