[U-Boot] Revert "[new uImage] Add autostart flag to bootm_headers structure"

[Wolfgang Denk]

Dear Kumar,

as discussed before, I have reverted your patch 

commit f5614e7926863bf0225ec860d9b319741a9c4004
Author: Kumar Gala <galak at kernel.crashing.org>
Date:   Wed Feb 27 21:51:48 2008 -0600

    [new uImage] Add autostart flag to bootm_headers structure
    
    The autostart env variable was dropped as part of the initial new uImage
    cleanup.  Add it back here so the arch specific code can decide if it
    wants to really boot or not.
    
    Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
    Acked-by: Marian Balakowicz <m8 at semihalf.com>


Best regards,

Wolfgang Denk

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