clk: meson: s4: fix module autoloading

Add MODULE_DEVICE_TABLE(), so modules could be properly autoloaded
based on the alias from of_device_id table.  Clocks are considered core
components, so usually they are built-in, however these can be built and
used as modules on some generic kernel.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20240410155406.224128-1-krzk@kernel.org
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>