[U-Boot] mmc_write.c: Make mmc_berase do 32bit safe 64bit math

[Tom Rini]

On Thu, Jun 11, 2015 at 08:53:31PM -0400, Tom Rini wrote:

> We want to see if the requested start or total block count are
> unaligned.  We discard the whole numbers and only care about the
> remainder.  Update the code to use div_u64_rem here and add a comment.
> 
> Cc: Hans de Goede <hdegoede at redhat.com>
> Cc: Pantelis Antoniou <pantelis.antoniou at konsulko.com>
> Cc: Bernhard Nortmann <bernhard.nortmann at web.de>
> Reported-by: Simon Glass <sjg at chromium.org>
> Signed-off-by: Tom Rini <trini at konsulko.com>
> Tested-by: Bernhard Nortmann <bernhard.nortmann at web.de>
> Reviewed-by: Hans de Goede <hdegoede at redhat.com>

Applied to u-boot/master, thanks!

-- 
Tom
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