[U-Boot] [RFC][PATCH] Update malloc to dlmalloc version 2.8.4

[Scott Wood]

Kumar Gala wrote:
> Those would help if the data structs had gotten bigger.  In this case  
> the code itself is just larger.

Perhaps we should look into using/writing a malloc implementation that 
takes a space/speed tradeoff more in line with U-boot's requirements 
(using a simple first-fit linear scan of free blocks, for example) -- 
and hopefully more readable than dlmalloc?

I nominate those with the tightest space requirements to do this. :-)

-Scott