net/vmxnet3: remove IP checksum from capabilities

net/vmxnet3: remove IP checksum from capabilities

The vmxnet3_prep_pkts function set rte_errno to ENOTSUP for any packets
having PKT_TX_IP_CHECKSUM set in ol_flags. But the vmxnet3 has
DEV_TX_OFFLOAD_IPV4_CKSUM set in this tx offload capa.

This issue has been introduced with the new Rx offload
API. DEV_TX_OFFLOAD_IPV4_CKSUM and DEV_RX_OFFLOAD_IPV4_CKSUM has been
added to the tx/rx offloads capa, but the vmxnet3 driver doesn't support
it.

To fix the issue, DEV_TX/RX_OFFLOAD_IPV4_CKSUM needs to be removed from
tx/rx offload capa.

Fixes: 95e4a96ccbf1 ("net/vmxnet3: convert to new Rx offload API")
Cc: stable@dpdk.org
Signed-off-by: Maxime Leroy <maxime.leroy@6wind.com>
Acked-by: Yong Wang <yongwang@vmware.com>