net/ice/base: fix flow raw field vector extraction

Correct the ordering of raw field extraction in the field vector
by taking into account the ordering setting for requesting block.

Fixes: aa1cd410fa64 ("net/ice/base: add flow module")
Cc: stable@dpdk.org
Signed-off-by: Dan Nowlin <dan.nowlin@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>