ASoC: amd: acp: delete unnecessary NULL check

The list iterator can't be NULL.  Delete the check and pull the code
in one tab.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/b0c5b0ca-68da-47e6-a8b0-e0714f0de119@moroto.mountainSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/acp/acp-rembrandt.c

@@ -266,7 +266,6 @@ static int __maybe_unused rmb_pcm_resume(struct device *dev)
 	acp6x_master_clock_generate(dev);
 	spin_lock(&adata->acp_lock);
 	list_for_each_entry(stream, &adata->stream_list, list) {
-		if (stream) {
 		substream = stream->substream;
 		if (substream && substream->runtime) {
 			buf_in_frames = (substream->runtime->buffer_size);
@@ -279,7 +278,6 @@ static int __maybe_unused rmb_pcm_resume(struct device *dev)
 				restore_acp_pdm_params(substream, adata);
 		}
 	}
-	}
 	spin_unlock(&adata->acp_lock);
 	return 0;
 }