can: esd_usb: Don't bother the user with nonessential log message

Replace a netdev_info(), emitting an informational message about the
BTR value to be send to the controller, with a debug message by means
of netdev_dbg().

Link: https://lore.kernel.org/all/20230509-superglue-hazy-38108aa66bfa-mkl@pengutronix.de/Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Suggested-by: Vincent MAILHOL <mailhol.vincent@wanadoo.fr>
Signed-off-by: Frank Jungclaus <frank.jungclaus@esd.eu>
Link: https://lore.kernel.org/r/20230519195600.420644-7-frank.jungclaus@esd.euSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/usb/esd_usb.c

@@ -955,7 +955,7 @@ static int esd_usb_2_set_bittiming(struct net_device *netdev)
 	msg->setbaud.rsvd = 0;
 	msg->setbaud.baud = cpu_to_le32(canbtr);
 
-	netdev_info(netdev, "setting BTR=%#x\n", canbtr);
+	netdev_dbg(netdev, "setting BTR=%#x\n", canbtr);
 
 	err = esd_usb_send_msg(priv->usb, msg);