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There are currently 2 ways to create a set of sysfs files for a kobj_type, through the default_attrs field, and the default_groups field. Move the greybus audio code to use default_groups field which has been the preferred way since aa30f47cf666 ("kobject: Add support for default attribute groups to kobj_type") so that we can soon get rid of the obsolete default_attrs field. Cc: Vaibhav Agarwal <vaibhav.sr@gmail.com> Cc: Johan Hovold <johan@kernel.org> Reviewed-by: Alex Elder <elder@linaro.org> Acked-by: Mark Greer <mgreer@animalcreek.com> Link: https://lore.kernel.org/r/20211228135541.380275-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>