net: hns3: make function hclge_set_all_vf_rst() static

Fixes the following sparse warning:

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c:2431:5: warning:
 symbol 'hclge_set_all_vf_rst' was not declared. Should it be static?

Fixes: aa5c4f17

 ("net: hns3: add reset handling for VF when doing PF reset")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>