[PATCH] imx8mq_pins: fix configuration for UART4 on ECSPI2 pads

[sbabic at denx.de]

> When routing UART4 using the ECSPI2 pads, register
> IOMUXC_UART4_RXD_SELECT_INPUT (offset 0x050C) should be changed only
> when dealing with RX, as its name suggests.
> Signed-off-by: Arnaud Ferraris <arnaud.ferraris at collabora.com>
> Reviewed-by: Fabio Estevam <festevam at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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