When the max Rx packet length is smaller than the sum of MTU size and
ether overhead size, it should be enlarged, otherwise the VLAN packets
will be dropped.
Fixes: 35b2d13fd6 ("net: add rte prefix to ether defines")
Cc: stable@dpdk.org
Signed-off-by: Steve Yang <stevex.yang@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>