net: hns3: add cmdq check for vf periodic service task

[ Upstream commit bd3caddf ]

When the vf cmdq is disabled, there is no need to keep these task running.
So this patch skip these task when the cmdq is disabled.

Fixes: ff200099 ("net: hns3: remove unnecessary work in hclgevf_main")
Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>