[PATCH] Documentation: fix typo

[Sascha Hauer]

On Mon, Jun 15, 2015 at 10:55:16AM +0200, Juergen Borleis wrote:
> This change enables Sphinx to resolve the reference.
> 
> Signed-off-by: Juergen Borleis <jbe at pengutronix.de>
> ---
>  Documentation/user/usb.rst | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks

Sascha

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