[lng-odp] Packet checksum override behavior

[Bogdan Pricope]

Hi Petri and Janne,

On APIs:

void odp_packet_l3_chksum_insert(odp_packet_t pkt, int l3);
void odp_packet_l4_chksum_insert(odp_packet_t pkt, int l4);

What is the expected behavior is checksum is requested but interface
does not support it?

a) best effort - do if you can (do nothing)
b) drop packet
c) ??

/Bogdan