[U-Boot] [U-Boot,1/1] cmd: gpio: use correct printf code

[Tom Rini]

On Sun, Jan 06, 2019 at 11:31:54AM +0100, Heinrich Schuchardt wrote:

> gpio is defined as unsigned int. So we should use %u when calling printf().
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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