[dts] [PATCH] tests/vxlan: correct the attribute name of UDP object

[Liu, Yong]

Thanks, Herbert. Applied.

On 12/15/2017 01:58 PM, Herbert Guan wrote:
> outer[UDP] does not have attributes of 'dst'/'src', but has 'dport'
> 'sport' instead.  This patch corrects this typo.
>
> Signed-off-by: Herbert Guan<herbert.guan at arm.com>