doc: update recommended kernel version for i40e
doc: update recommended kernel version for i40e

add recommended DPDK/kernel driver/firmware version matching list for
i40e for 19.05

Signed-off-by: Lijuan Tu <5133a9ad40fc997bf94ef38018fa6e85c427a4d8@intel.com>
Acked-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>

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