[U-Boot] efi_loader: Fix relocations above 64kb image size

[Tom Rini]

On Thu, Aug 18, 2016 at 11:45:18PM +0200, Alexander Graf wrote:

> We were truncating the image offset within the target image to 16 bits
> which again meant that we were potentially overwriting random memory
> in the lower 16 bits of the image.
> 
> This patch casts the offset to a more reasonable 32bits.
> 
> With this applied, I can successfully see Shell.efi assert because it
> can't find a protocol it expects to be available.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>

Applied to u-boot/master, thanks!

-- 
Tom
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