validation: pktio: check that packet_len is smaller than MTU
validation: pktio: check that packet_len is smaller than MTU

Before sending/receiving packet, check that the packet_len configured
 is supported by the pktios MTU.
This allows interface that do not support jumbo frame to pass the test.
However it has the bad side effect of not thoroughly checking the
pktio if PKT_LEN_NORMAL is smaller than the MTU.

Signed-off-by: Nicolas Morey-Chaisemartin <7188b998d7bb37a035517aa285fa3f5a95344e80@kalray.eu>

kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa