[PATCH] ARM: dts: imx8ulp-evk: Fix iomuxc issue

[sbabic at denx.de]

> The property fsl,mux_mask is deleted by commit ed7bda5 (imx8ulp:
> synchronise device tree with linux). This causes the pinctrl
> driver not work on 8ULP, so fail to print any log.
> Signed-off-by: Ye Li <ye.li at nxp.com>
> Reviewed-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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