api: packet: src and dst packet must not be the same
api: packet: src and dst packet must not be the same

Concat and copy_from_pkt operations must be called with src and
dst packet handles which refer to the same packet.

Signed-off-by: Petri Savolainen <d528fd253b9aaf78fa72edbcc6249e82047f6ce6@nokia.com>
Reviewed-by: Balasubramanian Manoharan <affd9aba178b6c6e9aaff69252817fd03d71ae35@linaro.org>
Reviewed-and-tested-by: Bill Fischofer <52f3c909d51cc5d355a68a403df6906b3c1a8f83@linaro.org>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

erachmi/odp,erachmi/odp,erachmi/odp,erachmi/odp