dt-bindings: input: samsung,s3c6410-keypad: convert to DT Schema

Convert Samsung SoC Keypad bindings to DT schema with changes:
1. Rename "linux,keypad-no-autorepeat" property to
   "linux,input-no-autorepeat", because the latter was implemented in
   the Linux driver.
2. Add clocks and clock-names, already used by DTS and the Linux driver.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240312183001.714626-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>