net: hns3: add judge fd ability for sync and clear process of flow director

Currently, driver will always clear user defined field of flow director
in uninit process and sync flow director table in periodic task. However,
if hardware does not support flow director driver should not do those
processes, so add fd ability judgement.

The fd ability judgement in function hclge_clear_fd_rules_in_list() is
redundant, so delete it.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>