ASoC: intel: sof_sdw: Simplify get_slave_info

ASoC: intel: sof_sdw: Simplify get_slave_info

Now the first device on a link is not treated specially there is no
need to have a separate loop to handle the current link over the
future links, as the logic is identical. Combine this all into a
single processing loop.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230808132013.889419-12-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>