ASoC: Intel: avs: Fix config_length for config-less copiers

Copier's config_length shall always be at least one even if there is no
configuration payload to carry. While the firmware treats
config_length=0 or 1 in the same manner, the driver shall initialize the
module properly.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://msgid.link/r/20240405090929.1184068-5-cezary.rojewski@intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>