soundwire: bus: reduce verbosity on enumeration

No need to repeat the same info log on all enumerations (essentially
each power-up), keep it as debug information.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200419185117.4233-4-yung-chuan.liao@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/bus.c

@@ -563,9 +563,9 @@ static int sdw_assign_device_num(struct sdw_slave *slave)
 	}
 
 	if (!new_device)
-		dev_info(slave->bus->dev,
-			 "Slave already registered, reusing dev_num:%d\n",
-			 slave->dev_num);
+		dev_dbg(slave->bus->dev,
+			"Slave already registered, reusing dev_num:%d\n",
+			slave->dev_num);
 
 	/* Clear the slave->dev_num to transfer message on device 0 */
 	dev_num = slave->dev_num;