ice_fdir_find_fltr_by_idx
rule = ice_fdir_find_fltr_by_idx(hw, fsp->location);
old_fltr = ice_fdir_find_fltr_by_idx(hw, fltr_idx);
if (!ice_fdir_find_fltr_by_idx(hw, fsp->location) &&
ice_fdir_find_fltr_by_idx(struct ice_hw *hw, u32 fltr_idx);