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There is nothing from string_helpers.h used in the driver, correct
the header inclusion block accordingly.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/20230808164204.66818-1-andriy.shevchenko@linux.intel.com

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