spi: Move comment about chipselect check to the right place

The part of the comment about locking isn't that relevant compared to
the chip select check. So drop the sentence about locking.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20211007121415.2401638-2-u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi.c

@@ -564,6 +564,11 @@ static int __spi_add_device(struct spi_device *spi)
 	struct device *dev = ctlr->dev.parent;
 	int status;
 
+	/*
+	 * We need to make sure there's no other device with this
+	 * chipselect **BEFORE** we call setup(), else we'll trash
+	 * its configuration.
+	 */
 	status = bus_for_each_dev(&spi_bus_type, NULL, spi, spi_dev_check);
 	if (status) {
 		dev_err(dev, "chipselect %d already in use\n",
@@ -632,10 +637,6 @@ int spi_add_device(struct spi_device *spi)
 	/* Set the bus ID string */
 	spi_dev_set_name(spi);
 
-	/* We need to make sure there's no other device with this
-	 * chipselect **BEFORE** we call setup(), else we'll trash
-	 * its configuration.  Lock against concurrent add() calls.
-	 */
 	mutex_lock(&spi_add_lock);
 	status = __spi_add_device(spi);
 	mutex_unlock(&spi_add_lock);