tty: amiserial.c: move assignment out of if () block

We should not be doing assignments within an if () block
so fix up the code to not do this.

change was created using Coccinelle.

CC: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/amiserial.c

@@ -1782,7 +1782,8 @@ static int __exit amiga_serial_remove(struct platform_device *pdev)
 	struct serial_state *state = platform_get_drvdata(pdev);
 
 	/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
-	if ((error = tty_unregister_driver(serial_driver)))
+	error = tty_unregister_driver(serial_driver);
+	if (error)
 		printk("SERIAL: failed to unregister serial driver (%d)\n",
 		       error);
 	put_tty_driver(serial_driver);