USB: usblcd: Remove the superfluous break

Remove the superfuous break, as there is a 'return' before it.
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Link: https://lore.kernel.org/r/20200819012316.170388-1-jingxiangfeng@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/usblcd.c

@@ -187,7 +187,6 @@ static long lcd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		break;
 	default:
 		return -ENOTTY;
-		break;
 	}
 
 	return 0;