ASoC: Intel: avs: Assign I2S gateway when parsing topology

For formatted port - ssp%d - descriptions to have an effect, copier
module templates need to be updated with specified port value. This
value is later propagated to the firmware when module instances are
being instantiated.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220707124153.1858249-3-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>