net/enic: do not set checksum unknown offload flag
net/enic: do not set checksum unknown offload flag

PKT_RX_IP_CKSUM_UNKNOWN and PKT_RX_L4_CKSUM_UNKNOWN are zeros, so no
need to set them.

Signed-off-by: Hyong Youb Kim <410cadac1eb3154f1b3752aedc2559ad69f3863e@cisco.com>
Reviewed-by: John Daley <097981eb5abe5dbeac3142a4f5a88742d916de86@cisco.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk