net/i40e: support flow director space tracking

net/i40e: support flow director space tracking

This patch introduces a FDIR flow management for guaranteed/shared
space tracking.
The fdir space is reported by the
i40e_hw_capabilities.fd_filters_guaranteed and fd_filters_best_effort.
The fdir space is managed by hardware and now is tracking in software.
The management algorithm is controlled by the GLQF_CTL.INVALPRIO.
Detailed implementation please check in the datasheet and the
description of struct i40e_fdir_info.fdir_invalprio.

This patch changes the global register GLQF_CTL. Therefore, when devarg
``support-multi-driver`` is set, the patch will not take effect to
avoid affecting the normal behavior of other i40e drivers, e.g., Linux
kernel driver.

Signed-off-by: Chenmin Sun <chenmin.sun@intel.com>
Reviewed-by: Jingjing Wu <jingjing.wu@intel.com>