mei: use sysfs_emit() in tx_queue_limit_show sysfs

Using of snprintf is discouraged in sysfs use the new sysfs_emit() API.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20210208150649.141358-2-tomas.winkler@intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/main.c

@@ -1026,7 +1026,7 @@ static ssize_t tx_queue_limit_show(struct device *device,
 	size = dev->tx_queue_limit;
 	mutex_unlock(&dev->device_lock);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", size);
+	return sysfs_emit(buf, "%u\n", size);
 }
 
 static ssize_t tx_queue_limit_store(struct device *device,