[U-Boot] Allow runtime configuration of "zero-delay" check

[Tom Rini]

On Fri, Aug 17, 2012 at 10:53:12AM -0000, Joe Hershberger wrote:

> Define the new "-2" value for bootdelay to mean autoboot with no delay
> and don't check for an abort key (while "0" value means do check).
> 
> Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>

Applied to u-boot/master, thanks!

-- 
Tom
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