soundwire: allow BPT and audio stream run simultaneously

Now the SoundWire BPT stream and the audio stream can share the
SoundWire bus bandwidth. However, it is still not allowed to have more
than 1 BPT stream running simultaneously.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Author: bardliao

drivers/soundwire/stream.c

@@ -1237,18 +1237,10 @@ static struct sdw_master_runtime
 	struct sdw_master_runtime *m_rt, *walk_m_rt;
 	struct list_head *insert_after;
 
-	if (stream->type == SDW_STREAM_BPT) {
-		if (bus->stream_refcount > 0 || bus->bpt_stream_refcount > 0) {
-			dev_err(bus->dev, "%s: %d/%d audio/BPT stream already allocated\n",
-				__func__, bus->stream_refcount, bus->bpt_stream_refcount);
-			return ERR_PTR(-EBUSY);
-		}
-	} else {
-		if (bus->bpt_stream_refcount > 0) {
-			dev_err(bus->dev, "%s: BPT stream already allocated\n",
-				__func__);
-			return ERR_PTR(-EAGAIN);
-		}
+	if (stream->type == SDW_STREAM_BPT && bus->bpt_stream_refcount > 0) {
+		dev_err(bus->dev, "%s: BPT stream already allocated\n",
+			__func__);
+		return ERR_PTR(-EAGAIN);
 	}
 
 	m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL);