net/qede: fix Rx/Tx offload flags

net/qede: fix Rx/Tx offload flags

 - We don't support QinQ offload, so removing it now.
 - Fix incorrect offload flags in default rxconf
   Since qede PMD does not support per queue rx offload, it
   should not set default_rxconf.offload flags in .dev_infos_get().
   Although these offloads are enabled by default, they are per port
   and not per queue.

Fixes: 946dfd18a4ec ("net/qede: convert to new Rx/Tx offloads API")
Cc: stable@dpdk.org
Signed-off-by: Shahed Shaikh <shahed.shaikh@cavium.com>