net: hns3: Add ethtool interface for vlan filter

net: hns3: Add ethtool interface for vlan filter

BugLink: http://bugs.launchpad.net/bugs/1756097
This patch adds vlan filter enable switch to
support ethtool -K ethX rx-vlan-filter on/off.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 391b5e935633acdb84e2e65574ba747f176b3d5e)
Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>