cdx: controller: Do not open-code module_platform_driver()

Replace standard platform_driver_register() boilerplate with
module_platform_driver() to make code smaller.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Link: https://lore.kernel.org/r/20250502-cdx-clean-v3-4-6aaa5b369fc5@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>