[U-Boot] [patch] make hello world example work for at91sam9261ek and make readme clearer about this

[Wolfgang Denk]

Dear Remy Bohmer,

In message <49384d2e.2805420a.5c7b.ffff8d3b at mx.google.com> you wrote:
>
>  'examples/hello_world.c' contains a small "Hello World" Demo
>  application; it is automatically compiled when you build U-Boot.
> -It's configured to run at address 0x00040004, so you can play with it
> +The address it will run on is determined by the LOAD_ADDR for
> +your board in examples/Makefile.
> +If it's configured to run at address 0x00040004, you can play with it
>  like that:

Um... the new text is as misleading as the  old  one  was.  LOAD_ADDR
obviously  plays  a role for the entry point address, abut it's not a
1:1 relation. Probablky nobody would set LOAD_ADDR to 0x00040004 ...

Best regards,

Wolfgang Denk

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