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The existing link_mask flag is no longer sufficient to detect the hardware and identify which topology file and a machine driver to load. By reporting the slave_ids exposed in ACPI tables, the parent SOF driver will be able to compare against a set of static configurations. This patch only adds the interface change, the functionality is added in future patches. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20200110220016.30887-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>