serial: imx: Delete duplicated argument to '|' in imx_uart_probe

When calculate "ucr1" UCR1_TRDYEN is duplicate.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20200903062401.692442-1-yebin10@huawei.com


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