[U-Boot] [PATCHv2] check u-boot SPL size to avoid producing non-working images

[Wolfgang Denk]

Dear Pavel,

In message <20160528194124.GA27144 at amd> you wrote:
> Debugging SPL is hard, and if SPL is too big, it tends to crash in
> mysterious ways.
> 
> (I'm not sure what the exact threshold is, 49762 bytes works, 52426
> bytes does not, so 50000 should be good value).

Can you please make clear in the subject (or at least in the commit
message) that this change is only related to SoCFPGA systems? Thanks.

Best regards,

Wolfgang Denk

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