Reset the FDIR counters when FDIR inits. Without this patch,
when VF initializes or resets, all the FDIR counters are not
cleaned, which may cause unexpected behaviors for future FDIR
rule create (e.g., rule conflict).

Fixes: 1f7ea1cd ("ice: Enable FDIR Configure for AVF")
Signed-off-by: NJunfeng Guo <junfeng.guo@intel.com>
Signed-off-by: NLingyu Liu <lingyu.liu@intel.com>
Tested-by: NRafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>