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There is no use of of.h in the module, drop it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220203123354.76573-1-andriy.shevchenko@linux.intel.com

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>