serial: fsl_lpuart: fix the typo: UARTCR1_PE -> UARTCTRL_PE

Fix the typo: UARTCR1_PE -> UARTCTRL_PE
There have no function impacted since the macro define value is
the same.

Cc: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Andy Duan <fugang.duan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>