ASoC: rt722: get lane mapping property

ASoC: rt722: get lane mapping property

Rt722 supports multi-lane and the driver doesn't call sdw_slave_read_prop()
to get all properties. Add sdw_slave_read_lane_mapping() to get the
required lane mapping property.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://patch.msgid.link/20250204075224.162661-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>