net: hns3: modify definition location of struct hclge_vf_vlan_cfg

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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This patch just modifies definition location of struct hclge_vf_vlan_cfg
to sync code with linux mainline.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: shenhao <shenhao21@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>