USB: serial: bus: fix const issue in usb_serial_device_match()

JIRA: https://issues.redhat.com/browse/RHEL-116016
Conflicts:
* Avoiding commit d69d804 ("driver core: have match() callback in
  struct bus_type take a const *") that constifies device_driver *drv

commit 92cd405
Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 21 May 2025 15:41:34 +0200

  usb_serial_device_match() takes a const pointer, and then decides to
  cast it away into a non-const one, which is not a good thing to do
  overall.  Fix this up by properly setting the pointers to be const to
  preserve that attribute.

  Fixes: d69d804 ("driver core: have match() callback in struct bus_type take a const *")
  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  Signed-off-by: Johan Hovold <johan@kernel.org>

Signed-off-by: Desnes Nunes <desnesn@redhat.com>

Author: Desnes Nunes

drivers/usb/serial/bus.c

@@ -17,7 +17,7 @@ static int usb_serial_device_match(struct device *dev,
 						struct device_driver *drv)
 {
 	const struct usb_serial_port *port = to_usb_serial_port(dev);
-	struct usb_serial_driver *driver = to_usb_serial_driver(drv);
+	const struct usb_serial_driver *driver = to_usb_serial_driver(drv);
 
 	/*
 	 * drivers are already assigned to ports in serial_probe so it's