[U-Boot] fix always succesful memory test

[Tom Rini]

On Thu, Jan 07, 2016 at 11:36:04AM +0100, Rasmus Villemoes wrote:

> Since 51209b1f42cb ("Use common mtest iteration counting"),
> do_mem_mtest has always reported 0 errors and hence returned 0, even
> if errors were detected. Fix the helpers mem_test_alt() and
> mem_test_quick() to return the number of errors found.
> 
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>

Applied to u-boot/master, thanks!

-- 
Tom
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