ASoC: Intel: avs: Register HDAudio ext-bus operations

With ASoC representation of HDAudio codec added, update bus initiazation
to complete it.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220707124153.1858249-2-cezary.rojewski@intel.com


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