convert to module_platform_driver instead of init/exit
Suggested-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NLibo chen <libo.chen@huawei.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>