[PATCH v5 1/2] serial: mxc: enable the RX pipeline

[sbabic at denx.de]

> on imx8(mm) the RXDMUXSEL needs to be set for data going over the wire
> (as observable on a connected 'scope) to actually make it into the
> RXFIFO
> the reference manual is not overly clear about this, and only
> mentiones that "UCR3_RXDMUXSEL should always be set." - and since the
> CR3 register reverts to its reset values after setting the baudrate,
> setting this bit is done during '_mxc_serial_setbgr'
> Signed-off-by: Johannes Schneider <johannes.schneider at leica-geosystems.com>
> Reviewed-by: Peng Fan <peng.fan at nxp.com>
> Reviewed-by: Fabio Estevam <festevam at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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