ASoC: SOF: Fix probe point getter

Firmware API changes which introduced 'num_elems' param in several probe
structs such as sof_ipc_probe_dma_add_params also impacted getter for
both, DMA and probe points. All struct handlers except for
sof_ipc_probe_info_params have been updated. Align said handler too to
calculate payload size correctly.

Fixes: f3b433e469 ("ASoC: SOF: Implement Probe IPC API")
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200309142124.29262-1-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/probe.c

@@ -95,13 +95,17 @@ static int sof_ipc_probe_info(struct snd_sof_dev *sdev, unsigned int cmd,
 	if (!reply->num_elems)
 		goto exit;
 
-	bytes = reply->num_elems * sizeof(reply->dma[0]);
+	if (cmd == SOF_IPC_PROBE_DMA_INFO)
+		bytes = sizeof(reply->dma[0]);
+	else
+		bytes = sizeof(reply->desc[0]);
+	bytes *= reply->num_elems;
 	*params = kmemdup(&reply->dma[0], bytes, GFP_KERNEL);
 	if (!*params) {
 		ret = -ENOMEM;
 		goto exit;
 	}
-	*num_params = msg.num_elems;
+	*num_params = reply->num_elems;
 
 exit:
 	kfree(reply);