[U-Boot] common: cli_hush: Fix up simple typo

[Tom Rini]

On Fri, Dec 04, 2015 at 01:02:11PM -0600, Nishanth Menon wrote:

> Correct the spelling for character..
> 
> Signed-off-by: Nishanth Menon <nm at ti.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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