[PATCH v2 16/21] serial_lpuart: add support for i.MXRT

[sbabic at denx.de]

> Add i.MXRT compatible string and cpu type support to lpuart driver,
> to use little endian 32 bits configurations.
> Also according to RM, the Receive RX FIFO Enable (RXFE) field in LPUART
> FIFO register is bit 3, so this definition should change to 0x08 as done
> for i.MX8. It needs also to set baudrate the same way as i.MX8 does.
> Signed-off-by: Giulio Benetti <giulio.benetti at benettiengineering.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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