[U-Boot] kconfig: fix another bug of "make savedefconfig"

[Tom Rini]

On Fri, Sep 26, 2014 at 06:42:36PM +0900, Masahiro Yamada wrote:

> In some cases, the last lines of SPL or TPL are not output to a file.
> The entries remaining in the "unmatched" variable must be flushed.
> 
> Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
> Acked-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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