dt-bindings: input: touchscreen: edt-ft5x06: add report-rate-hz

It allows to change the M06/M12 default scan rate.

Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220621123937.1330389-2-dario.binacchi@amarulasolutions.com


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