net/ice/base: allow flexbytes matching on header

net/ice/base: allow flexbytes matching on header

Change the extraction sequence generated by flow director flexbytes to
use package mac protocol. Without this change data in packet headers
cannot be used for flexbyte matching. The old extraction for flex bytes
started at the beginning of the payload which is after the header.

Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Qiming Yang <qiming.yang@intel.com>