ASoC: SOF: Intel: add an empty adr_link

An empty adr_link is expected to terminate the
for (adr_link = mach_params->links; adr_link->num_adr; adr_link++) loop.
Allocate link_num + 1 links to add an empty adr_link.

Fixes: 5226d19 ("ASoC: SOF: Intel: use sof_sdw as default SDW machine driver")
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Author: bardliao

sound/soc/sof/intel/hda.c

@@ -1412,7 +1412,8 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 		link_mask |= BIT(peripherals->array[i]->bus->link_id);
 
 	link_num = hweight32(link_mask);
-	links = devm_kcalloc(sdev->dev, link_num, sizeof(*links), GFP_KERNEL);
+	/* An empty adr_link is needed to terminate the adr_link loop */
+	links = devm_kcalloc(sdev->dev, link_num + 1, sizeof(*links), GFP_KERNEL);
 	if (!links)
 		return NULL;