net/ice: rework for generic flow enabling

net/ice: rework for generic flow enabling

The patch reworks the generic flow API (rte_flow) implementation.
It introduces an abstract layer which provides a unified interface
for low-level filter engine (switch, fdir, hash) to register supported
patterns and actions and implement flow validate/create/destroy/flush/
query activities.

The patch also removes the existing switch filter implementation to
avoid compile error. Switch filter implementation for the new framework
will be added in the following patch.

Signed-off-by: Ying A Wang <ying.a.wang@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>