[U-Boot] [U-Boot,V2,02/10] imx8: scu: use dedicated MU for SPL

[sbabic at denx.de]

> SPL runs in EL3 mode, except MU0_A, others are not powered on,
> and could not be used. However normal U-Boot use MU1_A, so we
> could not reuse the one in dts. And we could not replace the one
> in dts with MU0_A, because MU0_A is reserved in secure world.
> Signed-off-by: Peng Fan <peng.fan at nxp.com>

Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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