[U-Boot] [Patch v2] Introduce a global bool type

[Wolfgang Denk]

Dear York Sun,

In message <1357602948-16848-1-git-send-email-yorksun at freescale.com> you wrote:
> 'bool' is defined in random places. This patch consolidates them into a
> single typedef, using _Bool introduced in C99.
> 
> Signed-off-by: York Sun <yorksun at freescale.com>
> ---
> Change since v1:
>  Move 'false' and 'true' to the common header file.

Please see Måns Rullgård's comment about using stdbool.h instead.

Then please make sure that a sufficient number of tool chains as well
as configurations using USE_PRIVATE_LIBGCC continue to work, i. e. in
a first step verify that these are still compile-clean.

Thanks.

Best regards,

Wolfgang Denk

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