ASoC: soc_sdw_utils: skip aux device if it is not present

ASoC: soc_sdw_utils: skip aux device if it is not present

Similarly to codec endpoints that may not be used [1], aux devices (like
HID) also may not be used. Hence skip aux devices which are not present.

[1] https://lore.kernel.org/all/20250414063239.85200-12-yung-chuan.liao@linux.intel.com/

Signed-off-by: Maciej Strozek <mstrozek@opensource.cirrus.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://patch.msgid.link/20260508094750.1246796-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>