i40e/i40evf: Add TX/RX outer UDP checksum support for X722

i40e/i40evf: Add TX/RX outer UDP checksum support for X722

Orabug: 21764569

X722 supports offloading of outer UDP TX and RX checksum for tunneled
packets. This patch exposes the support and leaves it enabled by
default.

Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 527274c78ea7e0cad8b44ea25509c42aa605634e)
Signed-off-by: Brian Maly <brian.maly@oracle.com>