[U-Boot] common: miiphyutil: avoid memory leak

[Tom Rini]

On Thu, Nov 26, 2015 at 10:26:59AM +0800, Peng Fan wrote:

> The following code will alloc memory for new_dev and ldev:
> "
> new_dev = mdio_alloc();
> ldev = malloc(sizeof(*ldev));
> "
> Either new_dev or ldev is NULL, directly return, but this may leak memory.
> So before return, using free(ldev) and mdio_free(new_dev) to avoid
> leaking memory, also free can handle NULL pointer.
> 
> Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
> Cc: Joe Hershberger <joe.hershberger at ni.com>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Bin Meng <bmeng.cn at gmail.com>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> Acked-by: Joe Hershberger <joe.hershberger at ni.com>

Applied to u-boot/master, thanks!

-- 
Tom
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