net: hns3: add barrier in vf mailbox reply process

maillist inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GVK7
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ac92c0a9a0603fb448e60f38e63302e4eebb8035



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In hclgevf_mbx_handler() and hclgevf_get_mbx_resp() functions,
there is a typical store-store and load-load scenario between
received_resp and additional_info. This patch adds barrier
to fix the problem.

Fixes: 4671042f ("net: hns3: add match_id to check mailbox response from PF to VF")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiantao Xiao <xiaojiantao1@h-partners.com>