net: hns3: add support for Hisilicon ptp sync device

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I78MGV


CVE: NA

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The hns3 driver provide ptp driver to get 1588 clock from
ethernet, but only the first PF on main chip can support this,
so, if getting ptp time from other chip, may have some bus
latency. The PTP sync device use to eliminate the bus latency.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>