net: icmpv6: Return valid verdict in case of success
net: icmpv6: Return valid verdict in case of success

Verdict NET_DROP returned even though it handled properly.

Change-Id: I61e04b12f971b39585e983aa9a1007c63acd8b4e
Signed-off-by: Ravi kumar Veeramally <406c082aeb452858c41b213a757768e1c1dff29e@linux.intel.com>

fbsder/zephyr,fbsder/zephyr,fbsder/zephyr,fbsder/zephyr,fbsder/zephyr