[RESEND PATCH 4/6] imx8m: Restrict usable memory to space below 4G boundary

[sbabic at denx.de]

> From: Frieder Schrempf <frieder.schrempf at kontron.de>
> Some IPs have their accessible address space restricted by the
> interconnect. Let's make sure U-Boot only ever uses the space below
> the 4G address boundary (which is 3GiB big), even when the effective
> available memory is bigger.
> We implement board_get_usable_ram_top() for all i.MX8M SoCs, as the
> whole family is affected by this.
> Signed-off-by: Frieder Schrempf <frieder.schrempf at kontron.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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