net: hns3: hclge_inform_reset_assert_to_vf() can be static

Fixes: 2bfbd35d ("net: hns3: Changes required in PF mailbox to support VF reset")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>