dt-bindings: clock: remove stih416 bindings

Remove the stih416 clock dt-bindings since this platform is no
more supported.

Signed-off-by: Alain Volmat <avolmat@me.com>
Link: https://lore.kernel.org/r/20230209091659.1409-11-avolmat@me.com
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: Alain Volmat