net: ipv4: Drop packet if source address is my address

If we receive a packet where the source address is our own
address, then we should drop it.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
(cherry picked from commit 19392a6d2b5eee26ba62fcc6f61e769b4cebaa32)
1 file changed