net: hns3: add query vf ring and vector map relation

[ Upstream commit a1aed456 ]

This patch adds a new mailbox opcode to query map relation between
vf ring and vector.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: 669554c5 ("net: hns3: direct return when receive a unknown mailbox message")
Signed-off-by: Sasha Levin <sashal@kernel.org>