USB: driver.c: remove err() usage

err() was a very old USB-specific macro that I thought had
gone away.  This patch removes it from being used in the
driver and uses dev_err() instead.

CC: Markus Grabner <grabner@icg.tugraz.at>
CC: Stefan Hajnoczi <stefanha@gmail.com>
CC: Julia Lawall <julia@diku.dk>
CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/line6/driver.c

@@ -1307,15 +1307,16 @@ static int __init line6_init(void)
 	retval = usb_register(&line6_driver);
 
 	if (retval) {
-		err("usb_register failed. Error number %d", retval);
+		printk(KERN_ERR KBUILD_MODNAME
+		       ": usb_register failed. Error number %d\n", retval);
 		return retval;
 	}
 
 	line6_request_version = kmalloc(sizeof(line6_request_version0),
 					GFP_KERNEL);
 
 	if (line6_request_version == NULL) {
-		err("Out of memory");
+		printk(KERN_ERR KBUILD_MODNAME ":Out of memory\n");
 		return -ENOMEM;
 	}