ASoC: Intel: sof_sdw: set codec_num = 1 if the device is not aggregated

We assume adr_link->num_adr = 1 if a device is not aggregated. However,
the assumption is not valid if there are different type devices on the
same soundwire link.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20230419195524.46995-6-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>