octeontx2-bphy-netdev: Add rfoe rx vlan forwarding configuration

commit  d57001f86c6d346b4935fc241b65640f5fa021d9 from
https://git.assembla.com/cavium/WindRiver.linux.git

This patch adds support for VLAN forwarding configuration which
enables/disables forwarding the incoming VLAN packets matching
a VID.

The configuration is done using "ip link" command:
Example (enable forwarding packets with vid 5):
    # ip link add link rfoe0 name rfoe0.5 type vlan id 5

Change-Id: Ie12e0f2d1c3339686aae9306a5d6ca8f0026f4a4
Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/51953
Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Meng Li <Meng.Li@windriver.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>