tty/serial/imx: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20201214133719.3893-1-zhengyongjun3@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>