net/ice/base: add non-word aligned IPv6 field support

net/ice/base: add non-word aligned IPv6 field support

Add non-word aligned field support for IPv6 with hlim, tc and proto.
All these fields are one byte within one word. In order to match
bytes within the IPv6 header for flow director we need to use a mask.

Signed-off-by: Junfeng Guo <junfeng.guo@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>