net/ice/base: improve flow director masking

net/ice/base: improve flow director masking

Currently, 3-tuple FD matching is implemented using masking. However,
this is using up twenty-four of the thirty-two FD masks available. This
patch uses the swap register more efficiently to implement the 3-tuple
matches, which saves all FD masks for other uses.

Added IPV6 versions of DSCP, TTL and Protocol fields for flow director
use.

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>