soundwire: stream: add 'slave' prefix for port range checks

We can only check for Slave port ranges, the ports are not defined at
the Master level. Also move the function to the 'slave port' block.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220126011715.28204-8-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/stream.c

@@ -1208,16 +1208,6 @@ static int sdw_config_stream(struct device *dev,
 	return 0;
 }
 
-static int sdw_is_valid_port_range(struct device *dev, int num)
-{
-	if (!SDW_VALID_PORT_RANGE(num)) {
-		dev_err(dev, "SoundWire: Invalid port number :%d\n", num);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 static int sdw_master_port_alloc(struct sdw_master_runtime *m_rt,
 				 unsigned int num_ports)
 {
@@ -1269,6 +1259,16 @@ static int sdw_slave_port_alloc(struct sdw_slave *slave,
 	return 0;
 }
 
+static int sdw_slave_port_is_valid_range(struct device *dev, int num)
+{
+	if (!SDW_VALID_PORT_RANGE(num)) {
+		dev_err(dev, "SoundWire: Invalid port number :%d\n", num);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int sdw_slave_port_config(struct sdw_slave *slave,
 				 struct sdw_slave_runtime *s_rt,
 				 struct sdw_port_config *port_config)
@@ -1283,7 +1283,7 @@ static int sdw_slave_port_config(struct sdw_slave *slave,
 		 * TODO: Check valid port range as defined by DisCo/
 		 * slave
 		 */
-		ret = sdw_is_valid_port_range(&slave->dev, port_config[i].num);
+		ret = sdw_slave_port_is_valid_range(&slave->dev, port_config[i].num);
 		if (ret < 0)
 			return ret;