clk: meson: meson8b: move bindings include to main driver

Now the clock ids are no more defined in private headers,
cleanup and include the dt-bindings headers from the main
driver file.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230607-topic-amlogic-upstream-clkid-public-migration-v2-18-38172d17c27a@linaro.org


Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>