[U-Boot] FDT driver initialization function declaration

[Wolfgang Denk <wd@denx.de>]

Dear Michal Simek,

In message <4FFC1EF8.9060705@monstr.eu> you wrote:
> 
> The hardest part I have identify on microblaze was about u-boot variables.
> Because based on information from device-tree you can choose where variables
> should be stored and also this memory should be accessible before u-boot
> try to read variables. It mean in very early state.

Device initialization before relocation is already hard enough;
resources are very limited then.  You will add the additional need to
have the FDT library available then, too.   Not to mention that you
need to load the DT blob, too.

This will be a lot of added complexity.

Best regards,

Wolfgang Denk

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