Convert txt binding of TI's DaVinci timer to dtschema to allow for
validation.

While at it, change the file name to match the compatible.
Signed-off-by: Kousik Sanagavarapu <five231003@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240727050736.4756-2-five231003@gmail.comSigned-off-by: Rob Herring (Arm) <robh@kernel.org>